A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Find the last number in the series below:

voN luJ yaM raM ---

Who always enjoys poor health?

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?

The more it dries, the wetter it becomes. Can you tell what it is?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?