The sum of the digits of a two digit number is 7. When the digits are reversed then the number is decreased by 9. Then find the number
Choose the most appropriate option:	A) 43	B) 34	C) 44	D) 35	E) 33
Let the original no be 10x+y   Sum of the digits x+y=7   When the digits are reversed then it is 10y+x   Since it is decreased by 9 it is written as (10y+x)-(10x+y)=9 solving this we get y=4   Substitute in x+y=7 we get x=3   so the number is 34 correct ans is 34
<result>B</result>
The sum of the digits of a two digit number is 7. When the digits are reversed then the number is decreased by 9. Then find the number