SAT I 每日一问:2013年7月31日
The correct answer is C
Explanation
All numbers divisible by both and are the multiples of and . Since and have no prime factor in common , then the least common multiple of and is equal to their product, namely . Every other multiple of and is divisible by . Thus, if is divisible by a number then all the multiples of and are divisible by that number. Therefore, it is enough to check by which number in the given options is divisible. Only divides and none of the other do. The answer must be .