Using Only Five 5's and any mathematical operator make sum as 37

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

I have branches, but no fruit, trunk or leaves. What am I?

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

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

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

What does below pictogram mean?

What is the difference between a jeweller and a jailer?

How can you take 2 from 5 and leave 4?