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

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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?

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

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

The more it dries, the wetter it becomes. Can you tell what it is?

what does the below math rebus puzzle mean?