How do you go from 98 to 720 using just one letter?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

A tourist visits a small town for his research. While in the town, he decides to get a haircut. Since the town is quite small, there are only two barbers in the town � one on the North Street and one on the South Street. The barbershop on the North Street is a mess and the barber has a weird and pathetic haircut. While the barbershop at the South Street is pretty tidy and the barber as well has an impressive haircut.

Which barbershop will the tourist visit for his haircut and why?

why number 8549176320 is one of a kind?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?