I am a number that is the same forwards and backwards, and I can be multiplied by myself to create a square. What number am I?
Category: Brain · Difficulty: hard
Hint: Think about the simplest form of a number.
Answer
9
Explanation
The number 1 is a palindrome and multiplying it by itself results in a square (1).
This is a hard brain riddle — a tricky one that takes a little thought. The answer is 9.
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