What digit should replace the question mark in the equation: 1? + 2? = 10?
Category: Math · Difficulty: medium
Hint: Consider how to make the total equal 10.
Answer
4
Explanation
Substituting ? with 4 gives 14 + 24 = 10, satisfying the equation.
This is a medium math riddle — a moderate challenge for most people. The answer is 4.
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