Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is :

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Solution

The correct option is C
85

Since the numbers are co-prime, they contain only 1 as the common factor.

Also, the given two products have the middle number in common.

So, middle number = H.C.F. of 551 and 1073 = 29;

First number = $(\frac{551}{29}) = 19$ ; third number = $(\frac{1073}{29}) = 37$ .

$∴$ Required sum = (19 + 29 + 37) = 85.

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