Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

No matter how little or how much you use me, you change me every month. What am I?

There is something which you can be arrested for attempting but not for successfully completing.

How many triangles are there on the puzzle below?

Remove two matchsticks to make the below equation correct.

Give it food and it will live; give it water and it will die.

In the four images below, can you find the odd one out?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?