Recently Active Puzzles Questions

What is the length of the strip of all millimetre squares in one square metre, if placed one along side the other? (u must calc. mentally) ...

One lady who made a living by selling eggs had 90 eggs which she wanted to sell, so she sent her three daughters to the market, giving 10 eggs to her eldest and cleverest daughter, 30 to the second and 50 to the third. 'You'd ...

three missionaries and three cannibals need to cross a river in a boat that can hold only two people.the missionaries must be careful to never allow the cannibals to outnumber them on either shore. how can everyone cross the ...

Cosider and tell what's wrong here..... -20 = -20 -36 +16 = -45 + 25 -81 +16 + 81/4 = -45 +25 + 81/4 (4 - 9/2 )2 = (5 - 9/2 )2 4 = 5 which is not possible..... ...

Here's the puzzle: A group of people live on an island. They are all perfect logicians -- if a conclusion can be logically deduced, they will do it instantly. No one knows the color of their eyes. Every night at midnight, a f ...

There are2 black hats and 3 white hats on a table. 3 men stand in a line such that the 3rd man can see the heads of the 2 bfore him, the 2nd can see the one bfore him only, and the 1st can see none. Another man came and rando ...

let x=y, so, x2=xy, so, x2-y2=xy-y2 so, (x+y)(x-y)=y(x-y) so, x+y=y putting x=1, 1+1=1 or, 2=1.......which cannot be possible......so find the fallacy...... ...

Agent Sheena somehow managed to break the shackles (literally!) and flee from the triangular room to which she was chained and confined. In the middle of the night while her captors were asleep, she tried to let herself out f ...

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On an island there are 5 pirates {A,B,C,D,E} who are equally greedy and equally logical. They have 1000 coins and they have to distribute it among themselves. First A gives his plan for distribution. If his plan is accepted b ...

This is one of my most favorite logic puzzles. Imagine you are in a room with 3 switches. In adjacent room there are 3 bulbs (all are off at the moment), each switch belongs to some bulb. It is impossible to see from one room ...

Similar to qeustion posted here http://www.targetiit.com/iit-jee-forum/posts/simple-puzzle-11129.html by Nishant sir Q *Image* I dont want u to calculate no. of triangles..instead derive a general formula for it[1] ...

Your friend has two children. You meet one of them and find out that he is a boy. What is the probability that the other child is a girl? P.S. - A child can only be a boy or girl ...

There are hundred prisoners each standing in a column. Each one is given a hat and there are two possible colors of hat which are red and white. The 100th person can see the hats of 99 people in front of him and the 99th pers ...

how can you make 6 by using three 1s? ...

5 pirates of different ages have a treasure of 100 gold coins. On their ship, they decide to split the coins using this scheme: The oldest pirate proposes how to share the coins, and all pirates remaining will vote for or aga ...

If in certain encoding :- 0EC878 = B7F8 0F7658 = 9478 0F325B = 507B 2F4F3C = 27D4 272809 = 393d 2FAD11 = CDD9 6B1959 = 114d then 6DD24D = ???? Here a,b,c,d,e,f are hex numbers and represents 10,11,12,13,14,15 respectively Goo ...

The grandfather paradox: if a time traveler were to kill his own grandfather before his father was conceived, thereby preventing his own birth. [3] What will happen ...

white to mate in 4 , no more ,no less *Image* ...

Take a 1,2 or 3 digit no and multiply it by 7*11*13 and see the result... :) Ex: 548*7*11*13=? After seeing the pattern u can just write the answer without calculating.. ...

A man had been sentenced to death. The man has 60 seconds to say something if he says nothing he will be killed in the most horrible way possible. If he tells the truth he will be shot & if he lies he will be hung. The man su ...

if today is sunday?what day waz 21st decenber2001???what is the trick to do such ones? ...

Several successive number was written in a row.Determine the least value of the number of this sequence such that: there exist a way to order it again such that all 3 adjacent numbers(ie written one -next- the other) have sum ...

S=1-1+1-1+1-1....................... infinity now thus, S=1- (1-1+1-1+1-1....................... infinity) thus S=1-S thus 2S=1 S=1/2 ...

This is a famous 'situation puzzle'. Those who already know the answer pls let others try! An Arab sheikh tells his two sons to race their camels to a distant city to see who will inherit his fortune. The one whose camel is s ...

A woman, while at the funeral of her own mother, met this guy whom she did not know. She thought this guy was amazing, so much her dream guy she believed him to be just that! She fell in love with him right there, but never a ...

using three zeroes and any mathematical operator (of three types only) produce 11 ...

*Image* Black stands for black's pieces, the other colour is for white. P stands for pawn. All other notations are standard. Its black's turn to play. Tell me how black can win in 3 moves. This puzzle is pretty nice, in that ...

Bay of Bengal is in which state????? ...

READ THIS CAREFULLY. THE IS A SIMPLE BUT A VERY TRICKY ONE. THOSE OF YOU WHO GET IT WILL HAVE NO PROBS, WHILE OTHERS WILL REALLY TURN M@D Three men decided to split the cost of a hotel room. The hotel manager gave them a pric ...