What does below rebus means ?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

O_er_t_o_

Complete the missing letters of the given word.

Which alphabet letter is a question?

Why Aeroplane windows are round?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Find the Goldfish below the given Image.

How many times can you subtract the number two from the number fifty?

What will you call your mother's brother's brother-in-law?