Answer: Please see explanation column for answers
Explanation:
When a number divides into another number without a remainder, it s called a factor of that number. Lets say we want to find the common factors of two numbers, we get the factors of each one and compare them. The common factor is the one that is found in both lists
While The Highest common factor, is the highest factor number found in both lists.
b) 2b , 3b
Factors of 2b= 1, 2 and b
Factors of 3b=1, 3 and b
Common factors =1 and b
HCF=1b
e) 5bc, 2c2, 3cd
Factors of 5bc= 1, 5, b, c
Factors of 2c2= 1, 2, c, c2
Factors of 3cd= 1, 3, c, d
Common factors = 1 and c
HCF= 1c
f) 4a2b, 8b2c, 6bcd
Factors of 4a2b= 1, 2, 4, a, a2, b
Factors of 8b2c= 1, 2, 4, 8, b, b2, c
Factors of 6bcd= 1, 2,3,6, b, c,d
Common factors = 1, 2 , b
HCF= 2b