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avatar+9627 

1) Use the numerals 1, 9, 9 and 6 exactly in that order to make the following numbers: 28, 32, 35, 38, 72, 73, 76, 77, 100 and 1000

You can use the mathematical symbols +, -, ×, /, √, ^ (exponent symbol) and brackets. You can combine 2 numerals to form a 2 digit number.

 

2) Use exactly four 4's to form every integer from 0 to 20, using only the operators +, -, x, /, () (brackets) ^2 (square), and ! (factorial). 

You can combine 2 numerals to form a 2 digit number.



Example: 0 = 44-44

 Jan 4, 2017
 #1
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Here is 28: 1 + [sqrt(9)^(9 - 6)] =1 + 3^3 =28

 Jan 4, 2017
 #2
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Correct!!

My answer: \(28 = 1 + 9 + \sqrt9 \times 6\)

MaxWong  Jan 5, 2017

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