When it's bad luck to meet a black cat?

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?

Where do fish keep their money?

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?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

Can you find the mistake in the below statement?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Through your logical capabilities, can you make 7 an even?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?