Can you replace the question mark with the correct number?

If,

Akriti = 631
Levis = 521
Sroti = 521
Aneel = 533
Then,
Sunil =?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

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

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What does this mathematical rebus means ?