# Math Riddles

Math Riddles - we offer best online math riddles and brain teasers for kids and adults. 100+ math riddles to think out of the box.

##### Double Number Riddle

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Asked by Sachin on 25 Feb 2024

##### Let's Count the Triangles

How many triangles are there on the puzzle below?

Asked by Jeff on 10 Feb 2024
##### Know the Age

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

Asked by Jeff on 29 Jan 2024

##### Solve the Simple Equation

Can you solve below mathematical equation?

2^1234 - 2^1233

Asked by Vinay on 26 Jan 2024
##### Weight of Animals

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Asked by Sachin on 17 Jan 2024
##### Cow and Milk Distribution

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

Asked by john on 05 Jan 2024

##### Next Number In the Pattern

What is next number in the pattern below:

131 517 192 123 ?

Asked by Mehmat on 31 Dec 2023
##### Birthdate together

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Asked by Sachin on 16 Dec 2023
##### Basket of Eggs for Sell

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

Asked by Paul on 06 Dec 2023

##### Train into a Tunnel

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Asked by Naresh on 26 Nov 2023

### Amazing Facts

###### Artificial Intelligence

Artificial Intelligence has crushed all human records in the puzzle game “2048,” achieving a high score of 839,732 and beating the game in only 973 moves without using any undo.