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

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

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?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

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

It is always ahead of me yet I can never see it. What is it?

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

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain