A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: Options:
A) 2
B) 15
C) 18
D) 7
E) 12
Let the ten's and unit digit be x and 8/x respectively.   Then,(10x + 8/x) + 18 = 10 x 8/x	+ x   10x2 + 8 + 18x = 80 + x2   9x2 + 18x - 72 = 0   x2 + 2x - 8 = 0   (x + 4)(x - 2) = 0   x = 2.   2nswer:2
<result>A</result>
A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: