Mr Issac used to like puzzle his students now and then. One day he wrote following message on board and asked students to guess topic of discussion:

XVXRY XCTXXN HXS XQXXL XND XPPXSXTX RXXCTXXN

Can you guess the topic

King built castle for all his queens. King has set of rules for all of them:

- there were no mirrors in castle
- they were not allowed to speak to anyone other than King. Also no form of communication is allowed between them
- King hated white hair so he will kill any queen with even single white hair when spotted by him
- queens can leave castle if they somehow realized that they have white hair
- no servant is allowed to communicate to individual queen or point to individual person
- King would visit castle only at the night

One morning, while serving tea servant tells all the queens that one of them has white hair. Will that Queen be able to save herself - How?

As Santa was going to St. Ives,
Santa met a man with seven wives.
Each wife had seven sacks,
Each sack had seven cats,
Each cat had seven kits.
Kits, cats, sacks and wives,
How many were going to St. Ives?

Nine boys and three girls wants to share equally their pocket money.
Every boy gave an equal sum to every girl, and every girl gave another equal
sum to every boy. Every child then possessed exactly the same amount. What was the smallest possible amount that each possessed?

If 9999 = 4, 8888 = 8, 1816 = 6, 1212 = 0, then 1919 =?

You have a jug of milk from which you have to remove one cup milk aside. But you only have a three-cup measuring container and a five-cup measuring container with you. So how will you remove exactly one cup milk aside?

What are the next three numbers in this series? 4, 6, 12, 18, 30, 42, 60, 72, 102, 108,...?

In following statement each number is indicated by one letter, let us know which letter corresponds to which number.

ABCD x EB = GHADH

The difference between two numbers is 54. They are composed of the same two digits reversed. What are the numbers?

What number should come next?

14, 316, 536, 764, ?