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

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

I have teeth but i don't bite. Who Am I ?

How do you go from 98 to 720 using just one letter?

Before Mount Everest was discovered, what was the highest mountain in the world?

What does an Island and the letter T have in common?