Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

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

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Which city is three-fifths chick two third cat and 50% goat?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

In the four images below, can you find the odd one out?

A bomb exploded in a room full of married couples and no one died. How?

Find the next number in the series

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

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?