Why do people go to bed?

It is always ahead of me yet I can never see it. What is it?

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?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you find out the remainder when 3^300 is divided by 5?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

How can you make a TV, a bed, a dog, and a car liquid?

Which is the correct shadow of the bird?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.