full transcript
"From the Ted Talk by Arthur Benjamin: A performance of "Mathemagic""

Unscramble the Blue Letters

AB: 25. The way we can square on most calculators — let me demonstrate with this one — is by taking the number, such as five, hitting "times" and then "equals," and on most calculators that will give you the square. On some of these ancient RPN calculators, you've got an "x squared" botutn on it, will allow you to do the calculation even faster. What I'm going to try and do now is to saqrue, in my head, four two-digit numbers faster than they can do on their calculators, even using the shortcut method. What I'll use is the second row this time, and I'll get four of you to each yell out a two-digit number, and if you would square the first number, and if you would square the second, the third and the fourth, I will try and race you to the aewnsr. OK? So quickly, a two-digit number please.

Open Cloze

AB: 25. The way we can square on most calculators — let me demonstrate with this one — is by taking the number, such as five, hitting "times" and then "equals," and on most calculators that will give you the square. On some of these ancient RPN calculators, you've got an "x squared" ______ on it, will allow you to do the calculation even faster. What I'm going to try and do now is to ______, in my head, four two-digit numbers faster than they can do on their calculators, even using the shortcut method. What I'll use is the second row this time, and I'll get four of you to each yell out a two-digit number, and if you would square the first number, and if you would square the second, the third and the fourth, I will try and race you to the ______. OK? So quickly, a two-digit number please.

Solution

  1. answer
  2. button
  3. square

Original Text

AB: 25. The way we can square on most calculators — let me demonstrate with this one — is by taking the number, such as five, hitting "times" and then "equals," and on most calculators that will give you the square. On some of these ancient RPN calculators, you've got an "x squared" button on it, will allow you to do the calculation even faster. What I'm going to try and do now is to square, in my head, four two-digit numbers faster than they can do on their calculators, even using the shortcut method. What I'll use is the second row this time, and I'll get four of you to each yell out a two-digit number, and if you would square the first number, and if you would square the second, the third and the fourth, I will try and race you to the answer. OK? So quickly, a two-digit number please.

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collocation frequency
digit number 22
number sir 4
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sir audience 3
month audience 3
digit numbers 3
digit calculator 3
cookie fission 3

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collocation frequency
digit number sir 4
number sir audience 3

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collocation frequency
digit number sir audience 3

Important Words

  1. ancient
  2. answer
  3. button
  4. calculation
  5. calculators
  6. demonstrate
  7. faster
  8. fourth
  9. give
  10. head
  11. hitting
  12. method
  13. number
  14. numbers
  15. quickly
  16. race
  17. row
  18. rpn
  19. shortcut
  20. square
  21. time
  22. yell