There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Why Aeroplane windows are round?

How can you tell a raw egg from a hard-boiled egg?

There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one goes and lights up every bulb. The second one goes and switches off all the even-numbered bulbs - second, fourth, sixth... and so on. The third one goes and reverses the current position of every third bulb (third, sixth, ninth? and so on.) i.e. if the bulb is lit, he switches it off and if the bulb is off, he switches it on. All the 100 strangers progress similarly.

After the last person has done what he wanted, which bulbs will be lit and which ones will be switched off?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

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?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months