## Search This Blog

### Top 20 Cool Puzzles

Cool Puzzles 1 : Unlock The Distance Puzzle
Difficulty ★★★★★     Popularity ★★★★★

Distances from you to certain cities are written below.
BERLIN 200 miles
PARIS 300 miles
ROME 400 milesAMSTERDAM 300 miles
CARDIFF ??? miles
How far should it be to Cardiff ?

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Cool Puzzles 2 : What Am I Puzzle
Difficulty ★★★★☆     Popularity ★★★★☆

If you throw me from the window,
I will leave a grieving wife.
Bring me back, but in the door, and
You'll see someone giving life!

What am I?

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Cool Puzzles 3 : Pyramid Number Puzzle
Difficulty ★★★★☆     Popularity ★★★★★

The below is a number puzzle. It should be read left to right, top to bottom.
1
1 1
2 1
1 2 1 1
1 1 1 2 2 1
? ? ? ? ? ?
? ? ? ? ? ? ? ?
Question 1: What is the next two rows of numbers?

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Cool Puzzles 4 : Challenging Logic Puzzle
Difficulty ★★★☆☆     Popularity ★★★★☆

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

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Cool Puzzles 5 : Trick Question
Difficulty ★★★☆☆     Popularity ★★★★☆

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

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Cool Puzzles 6 : Maths Joke Puzzle
Difficulty ★★☆☆☆     Popularity ★★★★☆

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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Cool Puzzles 7 : Puzzle In A Puzzle
Difficulty ★★★★☆     Popularity ★★★★★

What are the next two letters in the following series and why?
W A T N T L I T F S _ _
*Hint: Check Puzzle Title

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Cool Puzzles 8 : Cipher Age Puzzle
Difficulty ★★★★★     Popularity ★★★★☆

If Susan is 10, Arabella is 20, and Jim and Neal are both 5, but Richard is 10, how much is Jennifer by the same system?

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Cool Puzzles 9 : Popular Age Problem
Difficulty ★★★★☆     Popularity ★★★★★

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you man?
Bill: Not bad, got married and I have three kids now.
Jack: That’s awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool… But I still don’t know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh now I get it.

How old are Bill’s kids?

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Cool Puzzles 10 : November Maths Puzzle
Difficulty ★★☆☆☆     Popularity ★★★★☆

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

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Cool Puzzles 11 : Cipher Puzzle
Difficulty ★★★★☆     Popularity ★★★★★

What does this message say?

G T Y O R J O T E O U I A B G T

Hint
Count the letters and try splitting the letters up into groups.

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Cool Puzzles 12 : Cross Bridge Puzzle
Difficulty ★★★★☆     Popularity ★★★★☆

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

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Cool Puzzles 13 : Brain Twister Puzzle
Difficulty ★★★★☆     Popularity ★★★★★

2+3=8,
3+7=27,
4+5=32,
5+8=60,
6+7=72,
7+8=??

Solve it?

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Cool Puzzles 14 : Gold Bar Fewest Cut Puzzle
Difficulty ★★★☆☆     Popularity ★★★★☆

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

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Cool Puzzles 15 : Complete The Equation
Difficulty ★★★☆☆     Popularity ★★★★★

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

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Cool Puzzles 16 : Water Pails Puzzle
Difficulty ★★★☆☆     Popularity ★★★★☆

If you had an infinite supply of water and a 5 quart and 3 quart pails, how would you measure exactly 4 quarts? and What is the least number of steps you need?

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Cool Puzzles 17 : Find The Next Number
Difficulty ★★★★★     Popularity ★★★★☆

What are the next three numbers in this series?

4, 6, 12, 18, 30, 42, 60, 72, 102, 108, ?, ?, ?

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Cool Puzzles 18 : Weighing Balance Puzzle
Difficulty ★★★★☆     Popularity ★★★★☆

You can place weights on both side of weighing balance and you need to measure all weights between 1 and 1000. For example if you have weights 1 and 3,now you can measure 1,3 and 4 like earlier case, and also you can measure 2,by placing 3 on one side and 1 on the side which contain the substance to be weighed. So question again is how many minimum weights and of what denominations you need to measure all weights from 1kg to 1000kg.

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Cool Puzzles 19 : Brilliant Student Puzzle
Difficulty ★★★☆☆     Popularity ★★★★★

There was once a college that offered a class on probability applied to the real world.The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it.When everyone received the test it was a blank sheet of paper with a solitary question on it: 'What is risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

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Cool Puzzles 20 : Eight 8 Add Puzzle
Difficulty ★★★☆☆     Popularity ★★★★★

Can you add eight 8's together so they add up to an even one thousand ?

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Last Updated:2012-04-15

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