Question

The ones of a 2disits Number is twice the tens disits. When the number formed by reversing the disits is added to the original number the sum find 99.find the original number?

Answer 1

y=3 and x= 6 and original no is 36

Answer 2

let the ones digit be 2x
thens digit = x

orignal no. =10(x) + 2x = 12x

on reversing the no.s we get =10(2x) + x=21x

therefore,
21x + 12x =99
33x = 99
x = 99/33 = 3

orignal no. = 12x = 12x3 = 36

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