Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?

Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits?

Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number?

Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book?

Câu 5 : Find A, if A is 3 less than the average of 48; 55; 29 and A. The value of A is…

Câu 6 : The sum of denominator and numerator of a fraction is 121 and the fraction is equal to 4/7. Find the denominator of the fraction?

Câu 7 : The sum of two numbers is equal to 77. If the first number is multiplied by 8 and the second by 6, the two product are equal. The larger of these numbers is…

Câu 8 : Which is the greatest 2 - digit number divisible by 2, 3 and 4?

Câu 9 : Calculate: (1 + 2/5) x 6/7.

Câu 10 : Give the number sequence: 1, 4, 7, 10, 13, … Find the 15th term of the number sequence.

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:
Which of following numbers is composite?

Answer: 
.
Question 4:
P is a prime number and a factor of 8. What is P?
Answer: P = 
Question 5:
Find the sum of all the factors of 15
Answer: 
Question 6:
In the following figure, AN = 5cm and AB = 8cm. NB = 
cm

Question 7:
A prime number between 42 and 46 is 
Question 8:
Find the sum of all the factors of 19
Answer: 
Question 9:
How many prime numbers have formed ?
Answer: There are 
 numbers
Question 10:
How many multiples of 3 less than 1000?
Answer: 

Question 1:
The least common multiple of 330; 65; 15 is 

Question 2:
Given seven numbers: 25; 17; 39; 43; 239; 1021; 1023.
The composite numbers are  
(Write numbers in order from the least to the greatest and use ";")

Question 3:
The common factors of 18 and 27 are 
(Write numbers in order from the least to the greatest and use ";")

Question 4:
Given the set of even numbers: {2; 4; 6; …; 100}.The number of elements is 

Question 5:
Find four integer numbers a,b,c,d such that
a + b + c + d = 1
a + c + d = 2
a + b + d = 3
a + b + c = 4
Answer: (a;b;c;d)=() 

Question 6:
Find a four-digit natural number that is less than 2015.If the thousands digit is erased,the number will be decreased by 9 times. 
Answer:The number is 

Question 7:
Calculate: 1×2+2×3+⋯+100×101=

Question 8:
The  term of the expression A=1-7+13-19+25-31+⋯ is 

Question 9:
Given the expression A= ...
Find the value of n such that 2A+3=
Answer: n=

Question 10:
A natural number has six digits and the units digit is 4.If the units digit is moved to the first row then the number will be increasedby 4 times.The number is 

Question 1:
K is a prime number and a multiple of 43. What is K?
Answer: K = 

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

Question 3:
The smallest factor of 82 is 

Question 4:
The smallest multiple of 47 is 

Question 5:
In the following figure, RQ = 12cm and PR = 17cm. PQ = cm
 

Question 6:
In the following figure, AN = 5cm and AB = 8cm. NB = cm
 

Question 7:
A prime number between 42 and 46 is 

Question 8:
Find the sum of all the factors of 19
Answer: 

Question 9:
The sum of two of following numbers is divisible by 4 and 6. 
What are the two numbers?

(Write numbers in order, beginning smaller and use “;”)
Answer: 

Question 10:
How many prime numbers have formed ?
Answer: There are  numbers