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

- answer
- button
- 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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digit number |
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number sir |
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sir audience |
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month audience |
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digit numbers |
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digit calculator |
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cookie fission |
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#### ngrams of length 3

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digit number sir |
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number sir audience |
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digit number sir audience |
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#### Important Words

- ancient
- answer
- button
- calculation
- calculators
- demonstrate
- faster
- fourth
- give
- head
- hitting
- method
- number
- numbers
- quickly
- race
- row
- rpn
- shortcut
- square
- time
- yell