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?

How can you make number one disappear by adding something to it?

When is the top of a mountain similar to a savings account?

Why are televisions attracted to people?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

What do you see in the given picture?

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

Eight of us go fourth, not back, to protect our king from an attack. What are we?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?