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?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

What occurs twice in a week, once in a year but never in a day?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

What is the next number in this series?

4,12,84,3612....

I am quite hot but become too cold if you remove the first two letters. What am I?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.