If the LCM of two numbers 4 and 5 is 20. What is their HCF.
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Answered by
3
a x b = hcf x lcm
=> 4 x 5 = hcf x 20
=>20 = hcf x 20
=> hcf = 20/20
=> hcf = 1
Answered by
3
They both are prime numbers (4,5) and have no common multiple other than 1:
5=1*5
4=2*2*1
therefore their HCF is 1.
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