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:
Select:
A) 75	B) 81	C) 85	D) 89	E) 91
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 = 551/29= 
<gadget id="calculator">551/29</gadget>
<output>19</output>
19   Third Number= 1073/29= 
<gadget id="calculator">1073/29</gadget>
<output>37</output>
37   Required sum= (19 + 29 + 37)= 
<gadget id="calculator">(19 + 29 + 37)</gadget>
<output>85</output>
85.   ANSWER :85
<result>C</result>
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: