How can I cut the board into only two pieces so that they will fill the hole exactly?
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The circumference of the Earth is approximately 40,000 kilometers, and someone has just made... Try Puzzle >>
A magic rectangular belt always shrinks its length to 1/2 and width to 1/3 whenever its owner... Try Puzzle >>
A 1-metre stick is broken into two pieces at random. What is the length of the shorter piece,... Try Puzzle >>
A car has to carry an important person across the desert.
There is no petrol station in... Try Puzzle >>
Chains. Make-up. What's the connection? The answer lies in a film. The DIY chain of shops,... Try Puzzle >>
Joey leaves his house in the morning to go to day camp.
Just as he is leaving his house... Try Puzzle >>
In front of you are several long fuses.
You know they burn for exactly one hour after you... Try Puzzle >>
You have two straight lengths of wood.
How can you cut one of them so that one of the three... Try Puzzle >>
We know very little about the life of the mathematician Diophantus (often known as the 'father... Try Puzzle >>
Which is bigger: the total area of orange or the total area of red?
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You have to do an experiment to determine the highest floor on a 100-floor building from which... Try Puzzle >>
A girl, a boy, and a dog start walking down a road.
They start at the same time, from the... Try Puzzle >>
Gurmit Burmit is a hermit - he lives all on his own on a lonely desert island. There is sand... Try Puzzle >>
The founders of Hairytown decreed years ago that:
1. No two people can have the same number... Try Puzzle >>
You need to boil eggs for exactly 9 minutes, or else the visiting Duchess will complain, and... Try Puzzle >>
An eccentric professor used a unique way to measure time for a test lasting 15 minutes.
He... Try Puzzle >>
I have two glasses the same size. One contains 100 ml of lemonade and the other contains 100... Try Puzzle >>
Long-haired Mary Jones works for the Milk Marketing Board.
Hairy Mary At The Dairy they... Try Puzzle >>
If I drive half-way to the city at 30 km/hour, how fast do I have to go for the rest of the... Try Puzzle >>
Measure exactly 2 liters of water if you have:
1) 4 and 5-liter bowls
2) 4 and 3-liter... Try Puzzle >>
You have three bowls: 7, 4 and 3 liters in capacity.
Only the 7-liter is full.
Pour... Try Puzzle >>
You are camping, and have an 8-liter bowl which is full of fresh water.
You need to share... Try Puzzle >>
You are doing some gardening, and need exactly 4 liters of water to mix up some special formula... Try Puzzle >>
You are going to mix up some concrete, and in order to get it just right you need exactly 6... Try Puzzle >>
Jack and Jill did not have much success when they went up the hill to fetch a pail of water... Try Puzzle >>
You have a full bucket containing 24 liters of liquid.
You also have three empty buckets:... Try Puzzle >>
Imagine having three bowls, with the following capacities:
In bowl A (8 liters capacity)... Try Puzzle >>
In front of you is a balance.
Can you devise a system, using only 4 weights, that can measure... Try Puzzle >>
If it were two hours later, it would be half as long until midnight as it would be if it were... Try Puzzle >>
Someone has mixed up the apples. Read carefully what has happened. Can you find a way to help... Try Puzzle >>
You have a balance and the following items of which you know the weights: a small coin weighing... Try Puzzle >>
You have a balance scale with four weights. With these four weights you must balance any whole... Try Puzzle >>
You intend to fly non-stop around the world.
But you can only go halfway around the world... Try Puzzle >>
A pool has four taps.
The first tap takes two days to fill the pool, the second tap three... Try Puzzle >>
We have two red, two green and two yellow balls.
For each color, one ball is heavy and... Try Puzzle >>
Hungry Horace woke up one morning to find that his only clock had stopped working because the... Try Puzzle >>
The arrangement below shows 10 coins in three rows of four.
Your task is to re-arrange... Try Puzzle >>
Hungry Horace likes to keep a note of all the recipes he enjoys. Every year he selects his... Try Puzzle >>
Two trains are 200 km apart, and travelling towards each other at 50 km/hour each.
From... Try Puzzle >>
Three out of six look-alike balls are heavy. The other three are light.
How many weighings... Try Puzzle >>
There are three different color cylindrical vessels: Blue, Red, and Green, with the sizes,... Try Puzzle >>
I don't have a toaster, but my pan can hold three slices of bread when I make toast.
Each... Try Puzzle >>
There's a toy boat floating in a pool.
Place a lead ball in the boat (without sinking... Try Puzzle >>
Using a balance-type scale with weighing pans, you need to be able to measure all weights from... Try Puzzle >>
You have 10 bags full of coins, in each bag are 1,000 coins.
But one bag is full of forgeries,... Try Puzzle >>
You have 9 balls, equally big, equally heavy - except for one, which is a little heavier.
How... Try Puzzle >>
You have eight bags, each of them containing 48 coins.
Five of these bags contain only... Try Puzzle >>
Real jelly babies have a mass of 10 grams, while imitation jelly babies have a mass of 9 grams.... Try Puzzle >>
One of twelve pool balls is a bit lighter or heavier (you do not know) than the others.
At... Try Puzzle >>
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