Math Riddles & Number Puzzles
Math riddles combine numerical thinking with creative problem-solving. These are not straightforward math problems — they often involve clever tricks, unexpected interpretations, or require you to think about numbers in unconventional ways. Perfect for anyone who enjoys the intersection of mathematics and lateral thinking.
67 riddles
You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer can you boil the egg for only...
How can you distribute three apples to two fathers and their two sons, giving a whole apple to each.
A bat and a ball cost $1.10. The bat costs one dollar more than the ball. How much does the ball cost?
When was the latest year that is the same upside down?
An apple is 40 cents, a banana is 60 cents and a grapefruit is 80 cents. How much is a pear?
Three matches are sitting on a table. Without adding another make the three matches four. You are not allowed to break any of the matches.
A sphere has three, a circle has two, and a point has zero what?
A man is considering how quickly his life has flown by. He thinks to himself, "the day before yesterday I was 37, and next year I will be 40!" The man has made...
100 passengers are boarding a plane with 100 seats. The first passenger in line has lost his boarding pass and chooses a random seat to sit in. Each subsequent...
Can you name the largest number that can be written with four 1's?
When I take five and add six, I get eleven, but when I take six and add seven, I get one. What am I?
Three times what number is no larger than two times that same number?
If you have 30 white socks, 22 black socks and 14 blue socks scattered across the floor in the dark, how many would you have to grab to get a matching pair?
In a bicycle race, the man who came two places in front of the last man finished one ahead of the man who came fifth. How many contestants were there?
If three men can chop down three trees in three hours, how many men will it take to chop down six trees in six hours?
Each letter in the below equation stands for a different number, and each time the same letter appears, it is the same number. What is the only set of numbers t...
Three people check into a room. The bill is $30. They split it 3 ways. Later on the hotel realizes they should have charged $25 so they send a bellhop to return...
What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?
Can you find the last number in the number sequence given below? 10 : 10 : 20 : 45 : 110 : 300 : ?