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

What is common among 11, 69, and 88?

What do you get if you add 2 to 100 four times?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

How many letters are in the alphabet?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?