How many times can you subtract the number 5 from 25?

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

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Guess the hidden movie name?