The L.C.M of two numbers is 2310 and their H.C.F is 30. If one number is 770 the Other is  Choose the correct choice from the following answers.
A) 330
B) 90
C) 270
D) 250
E) 350

Rationale: "the other number = l . c . m * h . c . f / given number = 2310 * 30 / 770 = 90 answer is b ."
Answer: B