Algebrahard · Past Paper
In a two-digit number, the sum of digits is 9. If digits are reversed, the new number is 27 more than the original. Find the original number.
A36
B63
C45
D27
✓ Correct Answer: A — 36
Original: 10x+y. x+y=9. Reversed: 10y+x. (10y+x) - (10x+y) = 27 -> 9y-9x=27 -> y-x=3. Solving gives x=3, y=6. Number is 36.
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