What is common among 11, 69, and 88?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

How is a fly different from a mosquito?

Keyboard words are not in alphabetical order, Why?

Why did Buffon take the goal with him after every Juventus match?

Find the missing number in the sequence below:

You bought me for dinner but never eat me. What am I?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?