Question

the sum of two no. is 55 and the HCF and the LCM of these no. are 5 and 120 respectively. what is sum of reciprocals of the no. ?​

Answer 1

Answer:

product of numebrs = 5 x 120 = 600  factors = 5 x 5 x 3 x 2 x 2 x 2

sum is = 55

xy = 600

x + y = 55

reciprocal

1/x + 1/y = (x+y)/xy  = 55/600 = 11/120

Answer 2

You get the answer by adding all numbers.

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100+200+300+400+500+600+700

=1000+500+600+700

=2100+700

=2800