The L.C.M of two numbers is 2310 and their H.C.F is 30. If one number is 231 the Other is  Pick one:
A) 330
B) 300
C) 270
D) 250
E) 350

Rationale: "the other number = l . c . m * h . c . f / given number = 2310 * 30 / 231 = 300 answer is b ."
Answer: B