Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

During which month do people sleep the least?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

What brings you down but never up?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Remove two matchsticks to make the below equation correct.