2, 3, 5, 9, 17, _ What is the next number in the sequence?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

What is more useful when it is broken?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

In a family supper, a grandfather, a grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one daughter-in-law, and one mother-in-law need to sit at a table.

There are only seven chairs available at the place. How many more chairs do they have to borrow so that everyone can sit down together for the suppers if everybody requires a separate chair?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.