Measuring Puzzles

The circumference of the Earth is approximately 40,000 kilometers, and someone has just made... Try Puzzle >>

You have six beads placed in a plane. The object is to find two pairs of equidistant beads.... Try Puzzle >>

Joey leaves his house in the morning to go to day camp. Just as he is leaving his house... Try Puzzle >>

There are nine compositions (A to I) of eight colored cubes. Find two identical compositions.... Try Puzzle >>

In front of you are several long fuses. You know they burn for exactly one hour after you light... Try Puzzle >>

How many outlines of triangles of all sizes and shapes can you trace in the figure? <img... Try Puzzle >>

Imagine a 3x3x3 cube. How many cuts do we need to break it into 27 1x1x1 cubes? A cut... Try Puzzle >>

We know very little about the life of the mathematician Diophantus (often known as the 'father... Try Puzzle >>

Which area is bigger: the total orange or the total red? <img src="images/double-hearts-ratio.gif"... Try Puzzle >>

You have to do an experiment to determine the highest floor on a 100-floor building from which... Try Puzzle >>

In the illustration four flat cube-like shapes are shown. Their patterns are drawn with bold... Try Puzzle >>

A girl, a boy, and a dog start walking down a road. They start at the same time, from the... 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 >>

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 >>

There are five squares (one 3x3 and four 1x1) formed with 20 matchsticks, as shown in the illustration.... 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 >>

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 mobile with a keyboard which consists of 10 digits and two symbols, [#] and [*],... Try Puzzle >>

You have a balance and the following items of which you know the weights: a small coin weighing... Try Puzzle >>

Seven matchsticks form two squares as shown in the illustration. Move three matchsticks to... Try Puzzle >>

You have a balance scale with four weights. With these four weights you must balance any whole... Try Puzzle >>

You have nine circles (divided into 16 smaller sectors). Each has a different pattern of holes.... Try Puzzle >>

You have six squares (divided into 6x6 smaller squares). Each has a different pattern of... 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 >>

Two of the four jigsaw tiles have the same sum of their roots. Find these tiles. <img... Try Puzzle >>

We have two red, two green and two yellow balls. For each color, one ball is heavy and... Try Puzzle >>

If you re-assemble the pieces of each of the four compositions shown below, three of them will... 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 >>

Six coins make the Triangle Man shown in the illustration. The coins form three <b>identical</b>... Try Puzzle >>

Eight folding patterns are scattered around a triangular prism as shown in the illustration.... Try Puzzle >>

There's a toy boat floating in a pool. Place a lead ball in the boat (without sinking... 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 >>