Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

When it's bad luck to meet a black cat?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Can you move 2 matchsticks to form four equal sized squares.

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

Cristina was born in 1888. She just had her 30th birthday today how did that happen?