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Math & Logic · Ages 10–12

Riddle #85

It's 3:15 on a clock. What is the angle between the hour hand and the minute hand, in degrees?

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Answer: 7.5 degrees

The minute hand sits at 90°; the hour hand has moved a quarter of the way from 3 to 4, landing at 97.5°.

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More Math & Logic riddles for Ages 10–12

#86 I am a three-digit number. My tens digit is five more than my ones digit, and my hundreds digit is eight less than my tens digit. What number am I?
#87 Using only the digit 8 and the plus sign, how can you add together eight 8s to make exactly 1,000?
#88 Pick any number. Double it, add 10, divide the result by 2, then subtract your original number. No matter what number you start with, you'll always end up with the same answer. What is it?

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