求助Prep......

JGMATJ

怎么也想不通！?！?！?

In a certain deck of cards, each card has a positive integer written on it. In a multiplication game, a child draws a card and multiplies the integer on the card by the next larger integer. If each possible product is between 15 and 200, then the least and greatest integers on the cards could be:

答案是4 and 13, 我想的是3 and 15.
郁闷！！
请求高手！！！！
多谢！！！！！

kazemi

3*4=12<15
4*5=20>15, so 4

15*16=240>200
14*15=210>200
13*14=182<200, so 13

JGMATJ

现在想通了！！多谢 kazemi!! 好人！！！