Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

What does this rebus means ?

PROG WORKRESS

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

Why do you find that most of the buildings are deprived of the 13th floor?

If 21x = 79x, what is the value of x?

There is a place where if I stand up straight, I will still be considered sideways.

The centre of the third figure is empty. What digit should fit inside?

Solve this tricky question. You are trapped in a forest. With you, you have a gun preloaded with two bullets in it. In front of you, there is a tiger, a leopard and a jaguar.

How do you survive?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?