请教两题数学题

295

新东方练习题第页题：
data sufficiency:
15。what is the remainder when p^2  +p is devided by 2?
a)p>2;
b)p is an integer.
Ans :B
头疼为什么不是D
23 A man is holding 7 cards in his hand.4 8's and 3  6's.how many cards does he lay on the table?
a)the man lays a card on the table if the number on the card is divisible by 2
b)the man lays a card on the table if the number on the card is divisible by 3
Ans :A
为什么不是D。上下不是一样吗？[em07]

猫猫头

如果不是整数，你怎么确定它的remainder?

猫猫头

２３、so奇怪？我看不懂，原文就是这么表示的吗？好象有歧义哎～～

tongxun

23、条件2）8 不能被3整除，而6可以被3整除，所以不能确定放还是不放。

猫猫头

那如果它是指所有的加起来的数字，那有三个8不就也能被３整除了嘛

tongxun

猫猫头： 他的描述可是：the card，而不是the cards 啊。

猫猫头

哦，我看错了。。

daydream

23 A man is holding 7 cards in his hand.4 8's and 3 6's.how many cards does he lay on the table?
a)the man lays a card on the table if the number on the card is divisible by 2
b)the man lays a card on the table if the number on the card is divisible by 3

A) ==>放下了7张.
B) ==>放下了三张6'.
所以答案为D. 难道我的理解有错误吗? 请指点一下. 谢!!

295

第23题我还是不明白。。