Solve this logical number series puzzle by replacing the question mark with the correct number
9090 = 4
1234 = 0
6055 = 2
9081 = 4
8888 = ?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What number should come in place of the question mark below?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Can you solve the rebus below?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

What's a single-digit number with no value?

I cannot talk, but I always reply when spoken to. What am I?

What English word has three consecutive double letters?