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

What does it mean?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

By using 'because' continuously three times, can you make an English statement ?

John was drowned by he was not wet. How?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

A man escapes from jail using help from his girlfriend. The investigators suspect four girls of being the man's girlfriend.

Out of those four girls, one is his girlfriend who is lying. Two of the girls are completely innocent and are speaking the truth. One of the girls is the man's sister who is helping the girlfriend lie. Following are the statements from all four of them:

Ariana: "Myrna is his girlfriend."
Jane: "Angelina is lying."
Angelina: "Ariana is lying."
Myrna: "Jane is not his sister."

Can you find out who is the man's sister among them?

A bomb exploded in a room full of married couples and no one died. How?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?