I start with a digit, double it, and add five to get an even result. What could I be?
Category: Math · Difficulty: hard
Hint: Remember, doubling an odd number results in an even one.
Answer
An odd digit
Explanation
Only odd digits will satisfy the condition when doubled and added to five.
This is a hard math riddle — a tricky one that takes a little thought. The answer is An odd digit.
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