How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

Who has married many women but was never married?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

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

You need to move three matchsticks to form three squares. Can you do it?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?