You have a number that is twice the sum of its digits. What is the smallest possible two-digit number?
Category: Brain · Difficulty: medium
Hint: Explore the relationship between the digits.
Answer
18
Explanation
For 18: 1 + 8 = 9, and 2 * 9 = 18.
This is a medium brain riddle — a moderate challenge for most people. The answer is 18.
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