Question

the ratio between the LCM and HCF of 5,15 and 20 is
a) 9:1
b) 4:3
c) 11:1
d) 12:1

Answer 1

5=1*5
15=3*5
20=2*2*5
hcf=5
lcm=2²×3×5=60
ratio=5/60
=1/12
d)1:12
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