# Thread: Reversed digits

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## Reversed digits

If the tens digit x and the units digit y of a positive integer n are reversed, the resulting integer is 9 more than n. What is y in terms of x ?
(A) 10 - x
(B) 9 - x
(C) x + 9
(D) x - 1
(E) x + 1

2. Good post? |
Nevermind I know this one.

10x + y - 10y + x = 9
9x - 9y = 9
x- y = 1
x - 1 = y

Answer is D.

3. Good post? |
Is'nt (E) the Official Answer ??

10y+x-(10x+y) = 9
10y+x-10x-y = 9
9y-9x = 9
y = 1+x

4. Good post? |
Agree E

5. Good post? |
you are correct. thanks.

6. Good post? |
My ans is x + 1 i.e. E

10x + y + 9 = 10y + x
solve to get
y = x + 1

7. Good post? |
10y+x-10x-y=9

solving this , get y= x+1.

ans E

8. Good post? |
Another vote for E

9. Good post? |
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