I’m tall when I’m young, and I’m short when I’m old. What am I?

What can go up a chimney down, but can’t go down a chimney up?

Find the next number in the series below

21 32 54 87 131 ?

Move three sticks of the spiral below to form a square.

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

Solve the following series:
AZ, GT, MN, __, YB

Can you count the number of triangles in the given figure?

Can you replace the question mark with the correct number in the below table sequence?

What goes up but never comes down?

The pound is not a finish.

We are sharing a few instructions below, which you have to use in any suitable order to modify the above sentence such that the end sentence is a scientific fact.

- Eliminate a letter and supplement another in its place.
- Take away one word.
- Remove one letter from one word.
- Get rid of two letters from one word.
- Swap a word with its antonym.