The sum of the digits of a two-digit number is 9. When the digits are reversed, the new number is 9 more than the original number. Find the original number. Check your answer. a. 18
b. 27
c. 36
d. 45

9514 1404 393

  d.  45

Step-by-step explanation:

You can check the offered answers. You will find that the difference from reversing the digits will only be 9 if the digits differ by 9/9 = 1.

The original number is 45.

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Check

  45 + 9 = 54 . . . with the digits reversed