What seven-letter word has hundreds of letters in it?

They are three errirs in this question. Can you find them?

What number do you get when you multiply all of the numbers on a telephone's number pad?

Count the number of triangles in the given picture.

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?