What does this mathematical rebus means ?

Can you count the number of triangles in the given figure?

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?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

Can you find a rabbit in the given picture?

Can you place six X (crosses) in below board without making three in a row in any way ?

Which Travels Faster? Solve below famous picture riddle:

What's a single-digit number with no value?

81 x 9 = 801. What must you do to make the this equation true?

How is a fly different from a mosquito?