The 1 and Four 7’s Number Puzzle

Since the last number puzzle was enjoyed so much, I thought I’d pose another to give you a second opportunity to conquer one. This puzzle is similar in concept to the last one (except parentheses are allowed this time), so give it a shot!

1 and Four 7’s Number Puzzle

Use the numbers 7, 7, 7, 7 and 1 to create an expression that equals 100.

For this exercise you may use addition, subtraction, multiplication and division operators along with parentheses.

Rules:

1. You must treat each number as a complete number. (e.g. you can’t take 7 and 7 and put them next to each other to make “77”.)
2. You may use the arithmetic operations and parentheses as many times as you’d like in your expression. You do not have to use all of them.
3. You may not use exponents, any other numbers or mathematical operations.
4. Your answer must have exactly four 7’s and one 1.
5. You must adhere to the rules of mathematics.

Good Luck!

Click here for the solution!

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