Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

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?

What country can make you shiver?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

You can see three almost identical images below. Can you spot the odd one out from them?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title