Question

How to get a number 100 by using four sevens (7’s) and a one (1)?​

Answer 1

Answer:

Using the numerals 1,7,7,7 and 7 (a "1" and four "7"s) create the number 100. As well as the five numerals you can use the usual mathematical operations +, −, ×, ÷ and brackets (). For example: (7+1) × (7+7) = 112 would be a good attempt, but not right, because it is not 100.

Answer 2

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Answer:

(7+7) * (7+1/7) = 100

177 - 77 = 100

Explanation:

using four sevens (7) and a one (1) create the number 100. Expect the five numeral you can use the usual mathematical operations (+,-,×,:), root and brackets ().

Answer:

(7+7) * (7+1/7)

= (14) * { (49+1/7) }

= 14 * 50/5

= 2 * 50

= 100

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