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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

Can you replace the question mark with the correct number?

What has no start, end, or centre?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

You need to remove two matchsticks to make the below equation true. Can you do it ?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?