Question

The difference between two digit number and its reverse is 27. If digits of the number are in he ratio of 1:2. What is the original number ?

Answer 1

Let the number be xy
(10y+x) - (10x+y) = 27
9y - 9x = 27
y-x= 3
also the digits are in the ratio 1:2
x/y = 1/2
y = 2x
Putting this value in the previous equation x-y = 3 we get
2x - x = 3
x=3
as y = 2x = 6
hence the number is 36

Answer 2

Answer:

Step-by-step explanation:

x-y=3

x/y=1/2

hence---->

x=y/2

(substitiute)

y/2-y=3

=>-y/2=3

y=6

we got the digit ,same way other is 3