Find the next number in the sequence

5 12 24 36 ?

What is always in front of you but can’t be seen?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What does below Rebus say?

XLR8

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?