When multiplied by three, I give you a palindromic number. When divided by two, I yield a prime number. What number am I?
Category: Math · Difficulty: hard
Hint: Think about properties of numbers.
Answer
A number 11
Explanation
For 11, (11 * 3) = 33, which is a palindrome, and (11 / 2) is not a whole number, but remains prime.
This is a hard math riddle — a tricky one that takes a little thought. The answer is A number 11.
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