You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

Using Only Five 5's and any mathematical operator make sum as 37

What has a ring but no finger?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

What word begins and ends with an E, but has only one letter?

I have branches, but no fruit, trunk or leaves. What am I?

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

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?