If you add 5 to me, I equal 15. If you divide me by 2, I equal 5. What number am I?
10
10 + 5 = 15, and 10 / 2 = 5.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Easy. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
More math riddles
I am thinking of two numbers. Their difference is 7, and their product is 60. What are the two numbers?
Zoe gets 7 rulers on Monday and 7 rulers on Tuesday, then gives away 6. How many rulers are left?
Eli puts 3 green hats in each of 5 boxes. How many green hats is that altogether?
I have no flat faces, no straight edges, and no corners, yet every straight planar slice cut through my center produces an identical circle. What solid shape am I?
Kai counts chicks in a pattern: 2, 6, 10, 14. How many chicks come next?
12 flags are shared equally among 3 friends. How many flags does each friend get?