Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.
See classesLearn live with an expert or move at your own pace. Every option includes the complete TTP study system.
Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.
with Josh Braslow, 20+ years in test prep
Self-paced EA prep. Study on your schedule.
with
Complete access from day one. Study on your schedule.
How is x=y+9 equal to y=9-x? It should really be equal to y=x-9 and that's not even an answer choice. The mistake that you made is that you added the 9 to the number whose digits were reversed instead of adding the 9 to the original integer n. I guess you were confused with the wording.I Think IMO is B.
becoz if you go by the ques it says that
tens digit x and the units digit y that means 10x + y
and when we reverse this we get 10y + x + 9
futher simplify it we get
10x + y = 10y + x + 9
9x = 9y + 9
x = y + 9
y = 9 - x.
Hey abhinav85,abhinav85 wrote:I Think IMO is B.
becoz if you go by the ques it says that
tens digit x and the units digit y that means 10x + y
and when we reverse this we get 10y + x + 9
futher simplify it we get
10x + y = 10y + x + 9
9x = 9y + 9
x = y + 9
y = 9 - x.
