What word does this rebus represent?

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Can you find out the remainder when 3^300 is divided by 5?

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

I know a nine-letter word having only one vowel.
Do you ?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

With the help clues provided in the image, can you find the 5 digit key?

Can you solve below mathematical equation?

2^1234 - 2^1233

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?