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:  Choose the correct answer:
A) 18	B) 24	C) 42	D) 81	E) 90
Explanation:   Let the ten's and unit's digit be x and 8/x respectively.   Then,   (10x + 8/x) + 18 = 10 * 8/x + x   9x2 + 18x - 72 = 0   x2 + 2x - 8 = 0   (x + 4)(x - 2) = 0   x = 2   So, ten's digit = 2 and unit's digit = 4.   Hence, required number = 24.   ANSWER IS 24
<result>B</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: