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

What is the below Rebus indicate?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

The Little ant seems to be always confused. Do you know why?

Solve the puzzle by telling what does below picture means.

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

The more it dries, the wetter it becomes. Can you tell what it is?

You can win me and lose me but never buy me
You can not eat me and never want to part with me
I can make you cry or bring you joy
I am not a machine and definitely not a toy
You keep me but i am not forever just yours
You might find me in a case or on a shelf next to a vase
I am hard and i am tall if you bump me i am sure to fall
I am made of different materials and am at many events
If your lucky and fight hard I might be yours
What am I ?