LCM of two numbers is 78. Their GCD is 13. If one of the numbers is 26, then the other number is:

Correct option is A

Given:

LCM of two numbers = 78

GCD of two numbers = 13

One of the numbers = 26

Formula used:

LCM $$\times$$​ GCD = Number 1 $$\times$$ Number 2
Solution:

78 $$\times$$ 13 = 26 $$\times$$ Number 2

1014 = 26 $$\times$$  Number 2

$$\text{Number 2} = \frac{1014}{26} = 39$$​​

Thus, the second number is 39

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