# Math Puzzles

## The 5 Pirates Puzzle

Five pirates (of different ages) have a treasure of 100 gold coins. On the ship, they decide to split the coins using the following scheme: The oldest pirate proposes how to share the coins, and all pirates remaining will vote for or against it. If 50% or more of the pirates vote for it, then …

## Prime number trick (with solution)

Using prime numbers, you can amaze your friends with a prime prediction… 1. Ask your friends to pick any prime number greater than 3. 2. Square it. 3. Add 14. 4. Divide by 12. Without knowing which prime number your friends picked, you can still tell them:     There will be a remainder of 3. …

## Critical thinking puzzles

What comes in the first box? Source: http://puzzles4you.blogspot.com

## Cover-up Solution

Check the original puzzle here. No. Color the squares as shown. Now each tile must cover a blue, a yellow, and a red square. If weâ€™re to cover the figure completely, then it must contain an equal number of squares of each color. But it contains 17 blue squares, 18 yellow squares, and 19 red …

## The Weaver’s Puzzle

Here is one of the hardest puzzles you will see on the internet today. Can you figure out what’s the correct solution or will you just check for the correct answer? When the Weaver brought out a square piece of beautiful cloth, daintily embroidered with lions and castles, as depicted in the illustration, the pilgrims …

## The Blue Eyed Islanders Puzzle

Do you like mathematical brain teasers? This one should keep you busy for a while. There is an island upon which a tribe resides. The tribe consists of 1000 people, with various eye colours. Yet, their religion forbids them to know their own eye color, or even to discuss the topic; thus, each resident can …

## 100 Prisoners and a Light Bulb

Do you want a real challenging mathematical brain teaser? Help these 100 prisoners escape. 100 prisoners are imprisoned in solitary cells. Each cell is windowless and soundproof. There’s a central living room with one light bulb; the bulb is initially off. No prisoner can see the light bulb from his or her own cell. Each …

## Paradox Tuesday – The Barber Paradox

In this week’s Paradox Tuesday we discover some weird rules regarding barbers.

## Glass Half Full Riddle

Are you up for another riddle? Do you see the glass half empty of half full? You are in an empty room and you have a transparent glass of water. The glass is a right cylinder, and it looks like it’s half full, but you’re not sure. How can you accurately figure out whether the …

## Paradox Tuesday – The Pinocchio Paradox

The Pinocchio Paradox is all about saying an impossible statement. Here is a quick explanation.