I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

I have Rs.50 and I spend it in the way as below.

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Find out the number of circles in the given picture having Illusion

Where do you go to learn how to make ice cream?

Which Travels Faster? Solve below famous picture riddle:

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?