In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

What's the only room from which no one can enter or leave

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

A father's child, a mother's child, yet no one's son.

Who am I?

Can you find the six hidden animals in the picture below?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

John was piloting a plane behind a car but was never able to overtake it. Why?