Can you replace the question mark with the correct number?

John was piloting a plane behind a car but was never able to overtake it. Why?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

What four weights can be used to balance from 1 to 30 pounds?

Find the next number in the series below

21 32 54 87 131 ?

What brings you down but never up?