A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

What is the next number in this series?

4,12,84,3612....

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What can you see in the middle of March and April that you can never see in any other month?

Solve the alphametic puzzle by replacing the alphabet with the number.

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