When it's bad luck to meet a black cat?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

Can you replace the question mark with the correct number in the below table sequence?

Dwayne Johnson was running away with the loot from a heist in his car along with Vin Diesel. One tire was punctured and he dropped down to replace it. While changing the wheel, he dropped the four nuts that were holding the wheel and they fell into a drain. Vin Diesel gave him an idea using which they were able to drive till the rendezvous point.

What was the idea ?

Our product and our sum always give the same answer. Who are we?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?