I am the product of two prime numbers, both less than ten. My square root is an integer. What am I?
Category: Math · Difficulty: hard
Hint: Focus on prime factors to solve this.
Answer
Fifteen
Explanation
Fifteen equals three times five, both prime numbers under ten, and has a square root of 3.87.
This is a hard math riddle — a tricky one that takes a little thought. The answer is Fifteen.
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