Can you make four (4) nines (9) equal 100?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

How is the moon similar to a dollar?

How many triangles are there on the puzzle below?

What kind of band never plays music?

Which five letter word can be added at the end of below word to form a
valid word?

> Pin
> Check
> Boiling
> View

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

What does below chemistry rebus means?