You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Prove that the below maths equation is true.

8 + 8 = 91

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

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.

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Identify the hidden meaning behind this picture?