Can you replace the question mark with the correct number?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

How many Watermelons are there in the below picture?

What is so fragile that saying its name breaks it?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?