Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

It is always ahead of me yet I can never see it. What is it?

What breaks yet never falls, and what falls yet never breaks?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

There are 3 apples in the basket and you take away 2. How many apples do you have now?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?