Question

The ratio between a two digit number obtained on reversing its digits is 4:7 . If the difference between the digits of the number as 3. Find the number?

Answer 1

Answer:

(10x+y)/(10y+x)=4/7 (1)

x+y =9 (2)

7(10x+y) = 4(10y+x)

70x +7y =40y +4x

66x = 33y /33

2x = y

2x -y = 0 (3)

(2) + (3) => 3x =9

x = 3, y = 2x =6

36 is the number

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