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?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Different lights make me strange by changing me into different sizes. What am I?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

What country can make you shiver?

Why is the longest human nose just 11 inches?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Can you Find and name the hidden bird in the picture below ?

I have teeth but i don't bite. Who Am I ?