Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

How many times in a given day, minutes and hour clock comes in a straight line ?

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

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?

How many letters are in the alphabet?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?