Best short hard riddles for teens

cleanlogicmath

How do you make the number 7 an even number without addition, subtraction, multiplication, or division?
Drop the "S".
72.70 %
70 votes
logiccleanclever

What's the missing letter? J ? M A M J J A S O N D
F. Eplanation: The letters are the first letter of each of the twelve months. The second month is February.
71.90 %
97 votes