Which tank will fill first?

What does this simple rebus mean?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Can you find the dog hidden in a group of pandas?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

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?