23.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:
A. 75 B. 81
C. 85 D. 89
Answer: Option C
Explanation:
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 =
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551
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= 19; Third number =
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1073
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= 37.
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29
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29
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Required sum = (19 + 29 + 37) = 85.
