Riddle of the week
How many games?
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logic riddles
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thirty-two basketball teams enter a cup competition. The teams are paired randomly and the winning teams advance to the next round. How many games must be…
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magic circles
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math riddles
intermediate riddles
Insert the numbers 1-6 ,into the six small circles, each number once, so that the sum of the four numbers on each of the three outer circles will be the same
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MATH RIDDLES
magic circles
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math riddles
intermediate riddles
Insert the numbers 1-6 ,into the six small circles, each number once, so that the sum of the four numbers on each of the three outer circles will be the same
Magic sequence
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math riddles
hard riddles
A number with an exact ending is a number whice when dividing by the last digit,the quotient is exact: 512:2=256. 819:9=91 What are the smallest nine…
one move...
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math riddles
intermediate riddles
The equation 101-102=1 is incorrect. How can you correct it by moving one digit only?
LOGIC RIDDLES
The less weight coin
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logic riddles
intermediate riddles
There are 18 coins on the table which re look the same. One of the coins whighs less than the others. How can you find the false coin by using a balance scale…
How many games?
in
logic riddles
easy riddles
thirty-two basketball teams enter a cup competition. The teams are paired randomly and the winning teams advance to the next round. How many games must be…
Dance party
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logic riddles
intermediate riddles
Four girls went to a dance party. When they left, each of them took a hat belonging to another girl and a coat belonging to another, different girl. Muly took…
ENLIGHTENMENT RIDDLES
Don't miss the missile...
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enlightenment riddles
easy riddles
Two missiles speed directly to each other, one at 12,000 k"m per hour and the other at 18,000 k"m per hour.They started 2745 k"m apart. [What will be the…
The next letter
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enlightenment riddles
intermediate riddles
Here is a sequence of letters:S,M,T,W,T,F, ? What is the next,the missing letter?
The last pilot...
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enlightenment riddles
intermediate riddles
A British newspaper article from 10/10/1925 that was offered for sale at public auction stated that: "His Majesty's Government declares that the body of the…
VISUAL RIDDLES
Correct the equations...
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visual riddles
intermediate riddles
You see three incorrect equations in Roman digits formed by matches. How can you make the equations correct by changing the position of only one match in each…
don't raise your hand...
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visual riddles
intermediate riddles
Here are nine points in a square format: You need to draw 4 straight lines in a row with out raising hand from paper, so it pass through all the points
The bear's colour....
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visual riddles
intermediate riddles
A bear sets out from a point somewhere on earth, and walks one kilometer south, one kilometer east and one kilometer north, ending up at the point where he…
FAMOUS RIDDLES
The weights of Claude Bachet
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famous riddles
intermediate riddles
What is the smallest number of different weights you need to weigh any whole weight from 1 to 40 pounds?
Another famouse prisoner dylemma...
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famous riddles
hard riddles
A prisoner escaped from jail and reached two gates – one gate leads to freedom while the other one leads back to jail. At the gates, there are two prisoners…
How old was Diophantus
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famous riddles
intermediate riddles
Diophantus's youth lasts 1/6 of his life. He grew a beard after 1/12 more of his life. After 1/7 more of his life, Diophantus married. Five years later, he had…
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Beam Bam Bom…
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easy riddles
Working at a uniform speed, a carpenter takes 12 minutes to saw a long narrow beam into four equal parts. How long it would take him to saw the same beam into…
Einstein stairs
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famous riddles
intermediate riddles
A teenage boy is running down the stairs. If he jumps two steps at a time, he is left with one step at the end. If he jumps over three steps at a time, he is…
Cut the cake...
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visual riddles
easy riddles
How to divide a cake (round, square or rectangular) into eight equal parts using exactly three straight cuts?
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