# 2.2.1 Factors and Multiples, PT3 Practice

 
             
Question 1:
 How many prime numbers are there between 10 and 40?
 

 Solution:
 
Prime numbers between 10 and 40
 
= 11, 13, 17, 19, 23, 29, 31, 37
There are 8 prime numbers between 10 and 40.
 
 
 
 
             
Question 2:
 
Diagram below shows a sequence of prime numbers.
               Find the value of x + y.
 
 Solution:
 
Value of x + y
 
= 19 + 23
 = 42

 
 
             
Question 3:
 
The following data shows a sequence of prime numbers in ascending order.
               Find the value of x, y and of z.
 
 Solution:
 
x = 11, y = 31, z = 37
 
 
 
 
     
Question 4:
 
The following data shows a sequence of prime numbers in ascending order.
           Find the value of p, q and of r.
 
 Solution:
 
p = 59, q = 71, r = 79