Question

Identify the Greatest common factor and Lowest common multiple of each pair of

numbers.

a) 120 = 2² × 3 × 5, 210 = 2 × 3 × 5 × 7
i) GCF: ________
ii) LCM: ________

b) 252 = 2² × 3² × 7, 60 = 2² × 3 × 5
i) GCF: ________
ii) LCM: ________

Answer 1

For the pair (120, 210), the GCF is 30 and the LCM is 840. For the pair (252, 60), the GCF is 12 and the LCM is 1260.

Step-by-step explanation:

i) GCF: 2 x 3 x 5 = 30

ii) LCM: 2^2 x 3 x 5 x 7 = 840

i) GCF: 2^2 x 3 = 12

ii) LCM: 2^2 x 3^2 x 5 x 7 = 1260