Pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 20257 result(s) returned

Bar codes : can you decode a barcode?
In this activity, students are shown a key to the post office conversion code and given a bar coded zip code to decipher. The activity, part of the Figure This! collection of 80 math challenges emphasizing math in the real world, introduces the bar-coding system and explains how the system enables businesses and banks to run more efficiently. The Hint suggests that students group the long and short bars into sets of five and then refer to the key to see what number is being represented. Related
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Animal ages : do dogs age faster than people?
This activity challenges students to calculate the age of a large dog in equivalent human years. The activity, part of the Figure This! collection of 80 real world math challenges, explains the importance of conversion formulas to statisticians, scientists, and engineers. The Hint points out that the dog's growth rate changes after the first year. Related questions ask students to develop formulas that show the relationships between human years and the ages of small dogs and cats. The Did You Kn
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Sand pictures : what's missing?
This activity opens with pictures of traditional African sand paintings called sonas. A sona is comprised of dots and loops. One design is missing, and students are asked to study the patterns and determine the appearance of the missing design. The activity, part of the Figure This! collection of 80 math challenges emphasizing real world math, explains the importance of mathematical patterns in archaeology and cultural anthropology. The Hint suggests that students examine the number and arrangem
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Middle School Portal: Math and Science Pathways (MSP2)
This activity challenges students to interpret a bar graph to determine the average number of hours teenagers work per week. The activity, part of the Figure This! collection of 80 real world math challenges, explains how averages are used to describe data on academic performance, athletics, and wages. The Hint suggests that students assume that 100 students participated in the survey. Related questions ask students to calculate averages for additional data sets. The Did You Know feature offers
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

VCR : do you always get 6 hours of recording on a 6-hour tape?
This activity challenges students to use proportions to estimate how many 30-minute television shows can be recorded on a VCR tape using the SP (standard play) and the EP (extended play) modes. It is part of the Figure This! collection of 80 math challenges emphasizing math in the real world. The activity begins with the observation that fractions, ratios, and proportions are used in comparison shopping, making scale models, and describing population densities. The Hint suggests that students be
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Three squares : when do two squares make a new square?
This activity opens with a diagram of two unequal squares and challenges students to find a way to construct a third square from them. It is part of the Figure This! collection of 80 math challenges emphasizing math in the real world. The activity introduces the Pythagorean theorem and explains its importance in construction and engineering professions. Students are encouraged to model the problem using squares of paper. Related questions introduce Pythagorean triples, and the Did You Know page
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Gone fishing : my, my little fish, how you've grown!
Opening with a cartoon showing the weights of three combinations of fish, this activity challenges students to determine the weight of each fish. This activity is part of the Figure This! collection of challenges emphasizing real-world uses of mathematics. The introduction discusses algebraic reasoning and notes its importance to scientists, engineers, and psychologists. Students are encouraged to begin by adding the weights on all three scales. The answer page describes three strategies for sol
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Middle School Portal: Math and Science Pathways (MSP2)
This activity challenges students to fold a sheet of paper to create a business-size envelope in a way that wastes as little paper as possible. The activity, part of the Figure This! collection of 80 challenges emphasizing real-world uses of mathematics, introduces tessellations and explains how they are used to manufacture containers efficiently. Students are encouraged to begin the challenge by examining the pattern of an unfolded business envelope. Related questions ask students to consider t
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Two points! : who wins the game?
This activity challenges students to determine the probability of a basketball player scoring two points on a free throw if she is likely to make a basket three-fourths of the time. The activity, part of the Figure This! collection of 80 real world math challenges, introduces probability and explains its importance in the insurance industry, medical testing, and genetics. The Hint suggests that students model the problem by tossing a pair of coins. Related questions ask students to calculate the
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Middle School Portal: Math and Science Pathways (MSP2)
This activity challenges students to calculate, given the rate and hours per day in flight, how many days an arctic tern would require to fly the 9,000-mile roundtrip from the Arctic Circle to Antarctica. The activity, part of the Figure This! collection of 80 real world math challenges, explains the importance of calculating distances for railroad companies, trucking firms, and airlines. The Hint suggests that students begin by calculating how many miles the tern flies in one day. Related quest
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Middle School Portal: Math and Science Pathways (MSP2)
This activity opens with a scenario in which a rack of clothing, originally on sale for thirty percent off the original price, has been discounted by an additional fifty percent. Students are challenged to determine if the new price is actually eighty percent of the original price. The activity, part of the Figure This! collection of 80 real world math challenges, demonstrates that understanding percentages is important for making decisions based upon survey results, interest rates, and medical
Author(s): National Action Council for Minorities in Engineer

License information
Related content

Copyright 2004 National Council of Teachers of Mathematics. Copyright 1999-2004 KnowNet Construction, Inc.

Middle School Portal: Math and Science Pathways (MSP2)
In this activity, students explore what percentage means when looking at election results. The activity is part of the Figure This! collection of 80 online mathematical challenges emphasizing real world uses of mathematics. The activity features questions designed to help students think carefully about how percentages are used mathematically to determine outcomes. The answer to the first question provides a detailed examination of election results. The importance of understanding the meaning of
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Fire hydrant : what shape is at the very top of a fire hydrant?
This activity begins an exploration of geometric shapes by asking students why the five-sided (pentagonal) water control valve of a fire hydrant cannot be opened by a common household wrench. The activity, part of the Figure This! collection of 80 math challenges emphasizing math in the real world, explains how geometric shape contributes to the usefulness of many objects. A hint on the page calls students' attention to the shape of a normal household wrench, which has two parallel sides. Relate
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Middle School Portal: Math and Science Pathways (MSP2)
This activity asks the student to determine if Florence Griffith-Joyner moved faster than a car traveling 15 miles per hour when she ran 10 meters at a record-breaking 0.91 seconds during the Seoul Olympics. The activity, from the Figure This! collection of 80 math challenges, offers students real world problems related to conversions of units of measure for volume, distance, and temperature. Also included are questions relating to currency exchange and information about world records related to
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Combination locks : I forgot the combination! How many combinations will I have to try?
This activity asks the student to find the number of possible combinations for a lock showing the numbers 0 to 39. It is part of the Figure This! collection of 80 online mathematical challenges emphasizing real world uses of mathematics. The solution to the combination question applies the technique of using a smaller number of possible arrangements to study a problem. Students learn to use a tree diagram to model possible outcomes and explore the mathematical meaning of the term combination. Th
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Middle School Portal: Math and Science Pathways (MSP2)
In this activity, students learn about the body mass index (BMI) formula and how it can be used to determine health risk. The activity is part of the Figure This! collection of 80 online mathematical challenges emphasizing real world uses of mathematics. The activity web page contains links to a solution hint, the solution, and to other math questions, such as how the BMI formula can be written to show weight in kilograms and height in centimeters. Students and their families are challenged to u
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Windshield wipers : it's raining! Who sees more? The driver of the car or the truck?
This activity challenges students to use areas of geometric shapes to compare the areas cleaned by different designs of windshield wipers. Part of the Figure This! collection of 80 challenges emphasizing real-world uses of mathematics, this activity notes the importance of calculating area for surveyors, designers, and building contractors. Students examine an animation that shows the movement of two designs of windshield wipers. The one on a passenger car has the arm attached to the end of the
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Salaries : will women ever earn as much money as men?
In this activity, students are given a data set that compares the salaries of men and women over a period of years and asked to determine if women's salaries will ever be equal to those of men. The activity, part of the Figure This! collection of 80 online challenges emphasizing real world uses of mathematics, explains how data interpretation is important in such industries as advertising, athletics, and insurance. It suggests that students approach the problem by using fractions or difference t
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

I win! : she always wins, it's not fair!
In this activity, students play a game and examine what it means for a game to be fair. The activity is part of the Figure This! collection of 80 online mathematical challenges emphasizing real world uses of mathematics. In the game's 12 rounds, two six-sided die are rolled, the face values are subtracted, and data are recorded on a table. Player A wins if the difference is 0, 1, or 2, and Player B wins when the difference is 3, 4, or 5. The page contains a solution hint, the solution, and relat
Author(s): National Council of Teachers of Mathematics (NCTM)

License information
Related content

Content copyright 1999-2002 National Council of Teachers of Mathematics.

Middle School Portal: Math and Science Pathways (MSP2)
This activity challenges students to think about angles as geometric shapes and to find the sizes of the angles between their fingers. It is part of the Figure This! collection of 80 online mathematical challenges emphasizing real world uses of mathematics. For this challenge, the students trace a hand stretched to form an L-shape with the thumb and sketches angles of 90 degrees and 45 degrees between the thumb and index finger. They use the sketches to estimate the angles between their other fi
Author(s): National Action Council for Minorities in Engineer

License information
Related content

Copyright 2004 National Council of Teachers of Mathematics. Copyright 1999-2004 KnowNet Construction, Inc.

Pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013