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What is the sum of all positive integers r  that satisfy 

 

lcm [ r, 700 ] = 3500

 Nov 15, 2020
 #1
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r =  125,  250,  500,  875.
Sum = [125 + 250 + 500 + 875] =1,750

 Nov 15, 2020
 #2
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r =125,  250,  500,  875, 1,750, 3,500

Sum =[125 + 250 + 500 + 875 + 1,750 + 3,500] =7,000

Guest Nov 15, 2020

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