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

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Which country gets ill every time?

A generous owner of a company decided to give a bonus of $45 to every man and $60 to every woman on his birthday. But only one-ninth of the men and one-twelfth of the women were present to take the bonus.

Can you calculate the amount of money the owner spent if there were 3552 employees?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”