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

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Name a key which is hardest to turn.

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

Can you find out the number of the parking space in which the car is parked?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?