There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Give it food and it will live; give it water and it will die.

Different lights make me strange by changing me into different sizes. What am I?

Can you find out who is the kidnapper in below Picture and why, Explain ?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Be active and find the killer in the picture Riddle below.