Solution:

First notice what is written with black ink. You will find the word - Good. Inside those letters, you will see the white space. In the white space, the word "evil" has been written.
If you think of it in a psychological manner, you will be able to understand the hidden meaning. It suggests that "Good" is nothing but the absence of evil.

Solution:

199 - 99

Solution:

5 leopard and one sheep

since all animal are rational , once 1st leopard eats the sheep all the rest of leopard would know about this.

Solution:

White should move the rook from
A1 to D1 and hence complete the castling move.

Solution:

111111111

Explanation:
It's a maths magical square root series as :
Square root of number 121 is 11
Square root of number 12321 is 111
Square root of number 1234321 is 1111
Square root of number 123454321 is 11111
Square root of number 12345654321 is 111111
Square root of number 1234567654321 is 1111111
Square root of number 123456787654321 is 11111111
Square root of number 12345678987654321 is 111111111 (answer)

Solution:

Here is a way to do it. We dont know if it can be done using some other arrangement or not. If you know, do send us.

4 | 3 | 8
9 | 5 | 1
2 | 7 | 6

Solution:

The two numbers are 4 and 13 whose product is 52 and sum is 17.

Solution:

I + IX = X

The equation read from the other side becomes X = XI + I which is false.

Solution:

Jamie is a window cleaner who was tired after cleaning the windows on the 45th floor and thus leaped inside the building.

Solution:

See the figure for the answer. Wasn't it a bit tricky?

Solution:

Karate Kid (car + at + tea + kid)