What do you think with the below Picture ?

Who always enjoys poor health?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Can it be possible to build a house that has all its four walls facing towards the South?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?