A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

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?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

What four weights can be used to balance from 1 to 30 pounds?

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Using Only Five 5's and any mathematical operator make sum as 37

I cannot talk, but I always reply when spoken to. What am I?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?