What four weights can be used to balance from 1 to 30 pounds?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

How many times can you subtract the number two from the number fifty?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

There is a place where if I stand up straight, I will still be considered sideways.

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

When 99 is considered higher than 100?

All of you like to eat me. I am a five-lettered word. Remove the first two and I turn into an infamous animal. Remove just the first and I become a heinous crime. Remove the first and the last and you can groove on me.

Can you guess who am I?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Can it be possible to build a house that has all its four walls facing towards the South?