Question 1:
J is a factor and a multiple of 25. What is J?
Answer: J = 

Question 2:
How many prime numbers are less than 10? 
Answer: There are  numbers.

Question 3:
The greatest even factor of 62 is 

Question 4:
The smallest multiple of 47 is 

Question 5:
Find the sum of all the factors of 19
Answer: 

Question 6:
A prime number between 42 and 46 is 

Question 7:
The number 55 has  factors.

Question 8:
In the following figure, AN = 5cm and AB = 8cm. NB = cm
 

Question 9:
If m, n are consecutive odd numbers and  is divisible by 3 and 5 then m = 

Question 10:
The largest possible whole number that is less than 120 and has only 2 and 5 as prime factors is 

Question 1:
The smallest odd multiple of 9 is 

Question 2:
K is a prime number and a multiple of 43. What is K?
Answer: K = 

Question 3:
How many prime numbers are less than 10? 
Answer: There are  numbers.

Question 4:
P is a prime number and a factor of 8. What is P?
Answer: P = 

Question 5:
A prime number between 42 and 46 is 

Question 6:
In the following numbers, which has the most factors?

Answer: 

Question 7:
The number 55 has  factors.

Question 8:
Find the sum of all the factors of 15
Answer: 

Question 9:
How many times does the digit “0” appear in numbers from 1 to 1000?
Answer: 

Question 10:
If m, n are consecutive odd numbers and  is divisible by 3 and 5 then m = 

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?