Question

a number consists of two digits whose sum is 9.if 27 is subtracted from the number its digits are reversed.find the number

Answer 1

Let the number be xy

x+y=9............................1

10x+y -27=1=10y+x.....2

9x-9y=27

x-y=3..............................3

Adding equation 1 and 3

2x=12

x=6,y=3

The number is 63