What is the below Rebus indicate?

In the image given, you can find several triangles. Can you count them all?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

People put me on the table and cut me but do not eat me. What am I?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Solve the following series:
AZ, GT, MN, __, YB