Can you fill the blank with the correct number?

6 30 870 756030 _____

Can you write down eight eights so that they add up to one thousand?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

what does the below math rebus puzzle mean?

What does this Rebus Picture mean?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

10+10 and 11+11 can give you the same answer.

Explain how?

You see me once in June, twice in November, and not at all in May. What am I?

Can you replace the question mark with the correct number?

I am quite hot but become too cold if you remove the first two letters. What am I?