51 riddles with hints and detailed explanations
Can you name the largest number that can be written with four 1's?
A sphere has three, a circle has two, and a point has zero what?
What did the thief get for stealing the calendar?
You want to hire a temporary employee for one month. You offer him reasonable wages, but the employee suggests an alternative. For...
What is the significance of the following: The year is 1978, thirty-four minutes past noon on May 6th.
You start with 1000 then add 40 add another 1000 then add 30 add another 1000 then add 20 add one more 1000 then add 10 what is yo...
Of all the numbers whose literal representations in capital letters consists only of straight line segments (for example, FIVE), o...
You have two coins that add up to thirty cents and one is not a quarter. What are the 2 coins?
Is there a number which, when written as a word has same number of letters as its numerical value?
If half of five was two what would a third of ten be?
Jack is a farmer and owns some chickens. One day, he took a basket of fresh eggs to the market to sell. The first person bought h...
The ages of a father and son add up to 66. The father's age is the son's age reversed. How old could they be? (3 possible solution...
Jenna wrote all the numbers from 300 to 400 on a piece of paper. How many times did she write the digit 3?
The world's tallest skyscraper took seven years to build. Each year the workmen were able to double its height. How many years did...
With the numbers 123456789, make them add up to 100. They must stay in the same order. You can use addition, subtraction, multipli...
Five hundred begins it, five hundred ends it, Five in the middle is seen; First of all figures, the first of all letters, Take up...
How can the number four be half of five?
When asked how old she was, Suzie replied, "in two years I will be twice as old as I was five years ago." How old is she?
What has no beginning, end, or middle?
How many 9's are there between 1 and 100?
A bat and a ball cost $1.10. The bat costs one dollar more than the ball. How much does the ball cost?
1203=1 4566=2 8898=7 4566=2 5464=1 7774=0 4500=
A child playing on the beach had 6-1/6 sand piles in one place and 3-1/3 in another. If he put them together, how many sand piles...
He has one and a person has two, a citizen has three and a human being has four, a personality has five and an inhabitant of ear...