What is the sum of all common differences if it is possible to pair up all the numbers from 1 to 70, so that the positive difference of the numbers in each pair is always the same, i.e. one pairing is (1, 2), (3, 4), (5, 6), and (69, 70)?
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sum of all common diffences of 35 pairs
so
35*36/2= 630
snayasishkmr:
u joking or what ?we have to find the sum of common differences every possible common difference we can have so many pairs such as
(1,36),(2,37),(3,38)..............(34,69),(35,70) in this common difference is 35
so even if we go by this the sum of common differences till now m getting is 1+2+3+......+35=(35*36)/2 = 630
read the question carefully girl
but m not getting the right answer anyways thanks for the attempt i wish it was that simple
sorry
koi nai the answer is still wrong neither of us got it right haha
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