How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

There was a strange boy who was born before his father. How can this be possible?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Replace the question mark with the correct number below.

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

Which number should replace the question mark?

A father's child, a mother's child, yet no one's son.

Who am I?

In the Thar desert, 3 men found a big 24L Jar is full of water. Since there is a shortage of water so they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13L, a 5L and an 11-litre Jar.

How do they do it?

The more you take me, the more you leave me behind.
Who Am I?