Câu 1: Given that  is divisible by 9. What is the value of ? 
Câu 2: How many elements of the set A are divisible by 9?
Câu 3:A is a set of multiples of 12 less than 12. How many elements does the set A have?
Câu 4:Find the remainder when  is divided by 3.
Câu 5:Given that 511 is the sum of two prime numbers  and , . What is the value of ?
Câu 6:Given that . Find the value of .
Câu 7:Given that . How many divisors does the number A have?
Câu 8:Find the natural number  so that the product of  and 5 is a prime number.
Câu 9:
Given that . How many divisors does the number A have?
Câu 10:
Given that . How many divisors the number A have?
 

Câu 1:
A is a set of multiples of 12 less than 12. How many elements does the set A have?
Answer: The set A has  element(s)

Câu 2:
Find the remainder when  is divided by 9.
Answer: The remainder is 

Câu 3:
Find the remainder of  when it is divided by 3.
Answer: The remainder is 

Câu 4:
A is the set of factor of 12 more than 6. How many elements does the set A have?
Answer: The set A has  element(s)

Câu 5:
Find the natural number  so that the product of  and 5 is a prime number.
Answer: 

Câu 6:
Given that . How many divisors does the number A have?
Answer: The number A has  divisors.

Câu 7:
Given that . How many divisors does the number A have?
Answer: The number A has  divisors.

Câu 8:
How many prime numbers less than 10 are there?
Answer: There are  numbers. 

Câu 9:
Find the greatest 2-digit number that has 12 divisors.
Answer: It is 

Câu 10:
Among all natural number pairs  satisfy , one pair has the greatest product. What is this product?
Answer: The greatest product is 

Read the passage and choose the best answer

Except for a few unfortunate individuals, no law in this world can go against the fact that for most of us our family is an essential part of our lives. The moment you enter this cruel world, where each man is for himself, there are some near and dear ones out there who will do anything to ensure your happiness.

We are nothing more than a vulnerable and fragile object, without someone taking care of us on our arrival in this world. Despite all the odds, your family will take care of your wellbeing, and try their best to provide you the greatest comforts in the worled. No one out there, except your family must forgive the endless number of mistakes you may make in your life. Apart from teaching you forgive and forget lessons, they are always there for you, when you need them the most.

Family is the only place where children study a lot after school. In school, teachers teach children about the subjects which will help them to find a good job in future. But at home, parents teach children about good habits. They are not only the elements which help the children to shape their personalities but they also prepare them a suitable and bright future.

A good family makes a greater society. Father, mother, and children have to work in order to build a strong family. If any one of them fails, the whole family may collapse. The good name of the whole family can be ruined by a single member of the family. In order to avoid that unhappy scenario, every family member has to work hard and try their best. As a result, they will set good examples for the whole society. Families have a powerful impact on society and societies create countries.

Which of the following is the best title for the passage?

A. The importance of family

B. Educational role of family

C. Family and society

D. The birth of a fragile object