Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Find out the number of circles in the given picture having Illusion

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

Find the missing letter in the last circle logically in the given below picture.

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?