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Find GCF 20,30,100

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Your problem -> GCF 20,30,100

Factor of 20,30,100 are as follows...

 2 20 2 10 5 5 1

 2 30 3 15 5 5 1

 2 100 2 50 5 25 5 5 1

The HCF of a, b is the largest positive number that exactly divides both a and b.
Find HCF
 20 = 2 × 2 × 5 30 = 2 × 3 × 5 100 = 2 × 2 × 5 × 5 HCF = 2 × 5 = 10

HCF of 20,30,100 is 10

The LCM of a, b is the smallest positive number that is divisible by both a and b.
Find LCM
 20 = 2 × 2 × 5 30 = 2 × 3 × 5 100 = 2 × 2 × 5 × 5 LCM = 2 × 2 × 3 × 5 × 5 = 300

LCM of 20,30,100 is 300

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