If a number is multiplied by itself, then divided by 4, and the result is 9, what is the number?
Category: Math · Difficulty: expert
Hint: Think of reversing the operations.
Answer
6
Explanation
Let x be the number; x^2/4 = 9 implies x^2 = 36, thus x = 6.
This is a expert math riddle — one of the harder riddles here. The answer is 6.
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