A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Find the missing letter in the last circle logically in the given below picture.

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

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

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?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

Move four matchsticks to the below square to form three squares?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?