Can you count the number of squares in the given picture?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

What jumps when it walks and sits when it stands?

Can you name four days which start with the letter 'T'?

Find the value of "?" in the ball picture Riddle below:

What do you see in the given picture?

Why did the Girl throw the butter out of the window?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

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.