People make me, save me, change me, raise me. What am I?

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?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Can you count the number of matches in the picture below ?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

What work can one never finish?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

In the given picture, in how many ways can you read the word "Tiger"?

What does this Rebus Picture means ?