What is common among 11, 69, and 88?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

what's the probability of getting a king or a queen from a pack of 52 cards?

What happened when the wheel was invented?

What type of tree can I carry in my hand?

When it's bad luck to meet a black cat?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

How is a fly different from a mosquito?