How is a fly different from a mosquito?

Why is 6 afraid of 7?

Can you identify if it's a murder or a suicide ?

Name a key which is hardest to turn.

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?

What do you answer even though it never asks you questions?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

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

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E