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

Why do you find that most of the buildings are deprived of the 13th floor?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

Give it food and it will live; give it water and it will die.

Replace the question mark with the correct number in the below-given picture?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Replace the question mark with the correct number.

Can you find the company name in the pictogram below?

What does it mean?