Replace the question mark with the correct number in the below-given picture?

How many times can you subtract the number two from the number fifty?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

What English word has three consecutive double letters?

What kind of band never plays music?

The centre of the third figure is empty. What digit should fit inside?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?