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Grade: 6,    Subject: Math,    Topic: Relation between LCM and GCF
Question 1:
The product of two numbers is 'x' and their GCF is 'y'. Find the LCM for those numbers.

x/yy/x

xyx + y
 
Question 2:
GCF of two numbers is 14 and their product is 8400. What is the LCM of those two numbers?

140840

400600
 
Question 3:
The LCM of two numbers is 600 and their GCF is 15. One of the numbers is 75. Find the other number.

140120

20060
 
Question 4:
LCM of two numbers is 400 and their product is 6400. What is their GCF?

1856

1612
 
Question 5:
The GCF of two numbers is 18 and their LCM is 108. One of the numbers is 54. What is the other number?

3640

1624
 
Question 6:
The GCF of two numbers should be a factor of their ______.

SumHCF

HCF × 2LCM
 
Question 7:
GCF of two numbers is 18 and their product is 1620. What is their lowest common multiple?

90160

120540
 
Question 8:
The Lowest Common Multiple of two numbers is 420 and their Greatest Common Factor is 20. One of the numbers is 40. Find the other number.

200210

12080
 
Question 9:
Which of the following GCF and LCM is a possible combination of two numbers?

GCF = 18, LCM = 565GCF = 20, LCM = 535

GCF = 15, LCM = 525GCF = 16, LCM =295
 
Question 10:
GCF of two numbers is 7 and their product is 588. What is the LCM of those two numbers?

6628

8448
 
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