I am a 3-digit number. My tens digit is 3 times my hundreds digit. My units digit is 4 times my hundreds digit. The sum of all three of my digits is 16. What number am I?
268
Let the hundreds digit be x. The tens digit is 3x and the units digit is 4x. Their sum is x + 3x + 4x = 8x. Since 8x = 16, x = 2. Thus, the digits are 2, 6, and 8, forming 268.
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
The consecutive integers from 1 to 29 are written on a board. After one number is erased, the average of the remaining 28 numbers is exactly 15. Which number was erased?
Zoe gets 7 rulers on Monday and 7 rulers on Tuesday, then gives away 6. How many rulers are left?
Ava makes 4 rows of 3 sand castles and adds 2 more at the end. How many sand castles are there in all?
Ava has 18 dinner rolls and Lily has 8. How many more dinner rolls does Ava have?
Ida counts bees in a pattern: 4, 6, 8, 10. How many bees come next?
Half of the 16 gold coins on the table are taken away. How many gold coins are left on the table?