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

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

What word is pronounced the same if you take away four of its five letters?

The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.