Find the next number in the sequence

5 12 24 36 ?

How can you leave a room with two legs and return with six legs?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

What Does this text mean:

important=important

What is the next number in this matchsticks series riddle?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

How can a man go eight days without sleep?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

Replace the question mark with the correct number in the below-given picture?