Question

The sum of the digits of a 2 digit number is 9digit of the no are reversed the new no is decrease by 9 .Find the no

Answer 1

let the digits be x and y

the original no. is 10x+y

new number is 10y+x

given that,x+y=9

10y+x-(10x+y)=9

9y-9x=9

y-x=1

x+y=9

2y=10

y=5 and x=4

so the original number is 54

Answer 2

the answer is 54..
pacca.

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