Replace the question mark with the correct number below.

Prove that the below maths equation is true.

8 + 8 = 91

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Count the number of triangles in the given picture.

No one wants to have it, but if one got it, he does not want to lose it. What is It?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?