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 

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?
 

Long ago a lot of people thought the moon was a God . Other people thought it was just a light in the sky . And others thought it was a big ball of cheese .
Then telecopes were made .And men saw that the moon was really another world . They wondered what it was like . They dreamed of going there .
On July 20 , 1969 , that dream came true . Two American men landed on the moon . Their names were Neil Armstrong and Edwin Aldrin .
The first thing the men was that the moon is covered with dust . The dust is so thick that the men left footprints where they walked . Those were the first marks a living thing had ever made on the moon . And they could stay there for years and years . There is no wind or rain to wipe them off .
The two men walked on the moon for hours . They picked up rocks to bring back to us for study . They dug up dirt to bring back . They set up machines to find out things people wanted to know . Then they climbed back into their moon landing craft .

1. Did people think that the moon was god?

2. When did two men walk on the moon?

3. How long did the two men walk on the moon?

4. why did they pick up rocks to bring back to earth?

II. Match the two halves of the sentence. Then write the full sentence, using the word in brackets. Add commas where necessary. 1. yesterday was a public day 2. we didn’t want to wake anybody up 3. we didn’t know what time it was 4. it was a nice day 5. the door was open 6. you paid for the theater tickets 7. oil is an irreplaceable natural resource 8. we didn’t see Lisa for a long time. 9. Lilian was late for work 10. Sonia was tired 11. Eve had an attractive personality 12. mother had burnt the dinner 13. it’s a really useful book 14. Ellie hadn’t fully recovered yet 15. all the students had done poorly on the test she was very popular. (since) we ate out. (as) it explains everything very clearly. (because) none of us had a watch. (because) the teacher decided to give it again. (since) she missed the bus. (because) we went for a walk by the sea. (as) We didn’t recognize her. (because) we must do whatever we can to conserve it. (since) we came in very quietly. (as) she felt weak. (because) we didn’t have to go to work. (since) please let me pay for our dinner. (as) she’d been working very hard. (because) I walked in. (since)

Long ago a lot of people thought the moon was a God . Other people thought it was just a light in the sky . And others thought it was a big ball of cheese .
Then telecopes were made .And men saw that the moon was really another world . They wondered what it was like . They dreamed of going there .
On July 20 , 1969 , that dream came true . Two American men landed on the moon . Their names were Neil Armstrong and Edwin Aldrin .
The first thing the men was that the moon is covered with dust . The dust is so thick that the men left footprints where they walked . Those were the first marks a living thing had ever made on the moon . And they could stay there for years and years . There is no wind or rain to wipe them off .
The two men walked on the moon for hours . They picked up rocks to bring back to us for study . They dug up dirt to bring back . They set up machines to find out things people wanted to know . Then they climbed back into their moon landing craft .
Next day the landing craft roared as the two men took off from the moon . They joined Micheal Collins in the spaceship that waited for them above the moon . Then they were off on their long trip back to earth .
Behind them they left the plains and tall mountains of the moon . They left the machines they had set up . And they left footprints that may last forever .

1.What did the telecopes help the men before 1969

2.Why did the men leave their footprints on the moon

3.What did astronauts bring from the moon

4.What does the word ''it'' in line 3 mean

5.What was the first thing that the astronauts find about the moon