Replace the question mark with the number below given a simple math problem.

Which part of London exists in France as well ?

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

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

What goes through cities and fields, but never moves?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

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

Explain how?

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

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?