I am a two-digit prime number under 50. If you reverse my digits, you get another prime number that is 36 larger than I am. What number am I?
37
37 is prime. Reversing its digits yields 73, which is also prime. The difference between them is 73 - 37 = 36.
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: Medium. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
More math riddles
Omar has 17 acorns and Zoe has 5. How many more acorns does Omar have?
Ana has 10 butterflies. Ava has twice as many. How many butterflies do they have together?
15 dinner rolls are shared equally among 3 friends. How many dinner rolls does each friend get?
Eli puts 3 green hats in each of 5 boxes. How many green hats is that altogether?
You have 10 candy hearts and give 3 to your friend and 2 to your sister. How many do you keep?
A bag has 20 pieces of candy. You eat 6 and give 4 away. How many are left?