Answers

2016-03-11T22:03:25+05:30
Given that 
two consecutive numbers are x , x+2
their product is = 399
(x)(x+2) = 399
x² + 2 x - 399 = 0
x² + 21 x - 19 x - 399 = 0
x(x+21)-19(x+21) = 0
(x-19)(x+21) = 0
x = 19  ; x = -21 (cant be negative)
so,
x = 19
x+2 = 19+2
       = 21
the larger number is 21
sum of the digit = 2+1
                           = 3.

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