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

Prove that twice of ten is the same as twice of eleven.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

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

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

Why are all black people so quick ?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?