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?

Can you count the number of children in the picture below

When 99 is considered higher than 100?

Move four matchsticks to the below square to form three squares?

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

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

What is full of holes but still holds water?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?