What month of the year has 28 days?

Can you find out the remainder when 3^300 is divided by 5?

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

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?