If the least common multiple of two prime numbers x and y is 10, where x > y, then the value of 2x + y is
Choose the correct choice.
A) 7	B) 9	C) 11	D) 12	E) 21

Rationale: lcm of two prime numbers will basically be multiple of those numbers . lcm = 10 = 2 * 5 , both of which are prime . now we know x > y , so x = 5 and y = 2 . 2 x + y = 2 * 5 + 2 = 10 + 2 = 12 . answer : d
Answer: D