When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Find out the missing number in the picture attached:

Count the number of lines in the image below ?

The centre of the third figure is empty. What digit should fit inside?

Why do we preferably have round manhole covers and not square ones?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?