Question

The sum of digits of a two digit number is 9. If 27 is subtracted from the number, the digits are reversed. Find the number.

• A. 36
• B. 63
• C. 47
• D. 74

Answer 1

Answer:

B. 63

two-digit number =10x+y Reversed number =10y+x x+y=9 10x+y−27=10y+x 9x−9y=27 x−y=3 x=6 y=3 The two-digit number =10x+y⇒10×6+3=63.