How many multiples of 7 are there between 21 and 343, inclusive ?	Choose the correct choice from the following choices
A) 48 B) 47 C) 46 D) 45 E) 44

Rationale: "7 * 3 = 21 7 * 49 = 343 total multiples = ( 49 - 3 ) + 1 = 47 include 21 and 343 = 47 answer is b"
Answer: B