Algebrahard · Past Paper
A two-digit number is such that product of its digits is 18. If 27 is subtracted from number, digits interchange.
A63
B92
C36
D29
✓ Correct Answer: A — 63
Let digits be x, y. xy=18. (10x+y)-27 = 10y+x → 9x-9y=27 → x-y=3. Solving x-18/x=3 → x=6, y=3. Number is 63.
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