Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

What month of the year has 28 days?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

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?

What can you serve, but never eat?

Different lights make me strange by changing me into different sizes. What am I?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

How many times in a given day, minutes and hour clock comes in a straight line ?