The GCF of 40 and a number is 8. what is the number if it lies between 70 and 80?

Correct answer:

a =  72

Step-by-step explanation:

GCD(a,40)=8  40=2×2×2×5=23×5 70a80 70a80=23 10  a=23 9=72   Verifying Solution:  72=2332 40=235 GCD(72,40)=23=8  g=GCD(a,40)=GCD(72,40)=8

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gcf for 120,168,216

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