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

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

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

Solve the mathematical equation in the picture below.

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

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

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?