Let D = {1, 2, 3, 5, 6, 10, 15, 30}. Def...

Let D = {1, 2, 3, 5, 6, 10, 15, 30}. Define the operations `'+', '' and '"'"'` on D as follows a + b = LCM (a, b), `ab` = GCD (a, b) and `a'=30/a`. Then `(15'+6)*10` is equal to :

A

1

B

2

C

3

D

5

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The correct Answer is:

B

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Let D = {1, 2, 3, 5, 6, 10, 15, 30}. Define the operations `'+', '*' and '"'"'` on D as follows a + b = LCM (a, b), `a*b` = GCD (a, b) and `a'=30/a`. Then `(15'+6)*10` is equal to :

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Let D = {1, 2, 3, 5, 6, 10, 15, 30}. Define the operations `'+', '' and '"'"'` on D as follows a + b = LCM (a, b), `ab` = GCD (a, b) and `a'=30/a`. Then `(15'+6)*10` is equal to :