what does the below rebus means?

Which tank will fill first?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

How can a man go eight days without sleep?

Which is faster, Heat or Cold ? Explain.

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

Can you find out the missing number in the grid?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

By using 'because' continuously three times, can you make an English statement ?