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?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Count the number of triangles in the given picture.

Why do Chinese men eat more rice than Japanese men do ?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A boy was driving a car, a girl took a lift from her. She asked his name. The boy said - my name is hidden in my car’s number, find it if you can. After this, she got down Car number was [ WV733N ] Can you guess the name now?

You need to arrange three 7 and mathematical symbols to form number 1?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?