I am a single digit. If you turn me upside down, my value increases by exactly fifty percent. What digit am I?
6
When turned upside down, 6 becomes 9. 9 is 50% greater than 6 (6 + 3 = 9).
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
Square me and I remain unchanged; cube me and I stay the same; but attempt to divide any positive number by me and arithmetic grinds to a halt. What number am I?
A bag contains 3 red marbles and 2 blue marbles. Without looking, what is the minimum number of marbles you must draw to guarantee getting at least one red marble?
A solid 4x4x4 cube composed of 64 smaller 1x1x1 unit cubes is painted red on all outer surfaces. How many of the 1x1x1 unit cubes have exactly two faces painted red?
In a room of 30 people, every person shakes hands with every other person exactly once. How many total handshakes take place?
I have four legs inside my house when I am alone, but when my dog joins me, we have ten legs altogether. How many legs do I have?
Max counts squirrels in a pattern: 1, 4, 7, 10. How many squirrels come next?

