A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

Why Aeroplane windows are round?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

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

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

Count the number of squares in the picture below.

Rectify the following equality 101 - 102 = 1 by moving just one digit.

What has 88 keys?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?