Question

艾比、布雷特、卡尔和达娜坐在一排编号为 $1$ 到 $4$ 的四个座位上。乔看着他们说：“布雷特挨着卡尔。”“艾比坐在布雷特和卡尔之间。”然而乔的每一句话都是假的。布雷特实际坐在 $3$ 号座位。谁坐在 $2$ 号座位？

Abby, Bret, Carl, and Dana are seated in a row of four seats numbered $1$ to $4.$ Joe looks at them and says: “Bret is next to Carl.” “Abby is between Bret and Carl.” However, each one of Joe’s statements is false. Bret is actually sitting in seat $3.$ Who is sitting in seat $2?$

艾比

Abby

布雷特

Bret

卡尔

Carl

达娜

Dana

信息不足，无法确定

There is not enough information to be sure

答案：D

知识点：逻辑推理

难度评级：1060

小提示：

“布雷特挨着卡尔”是假的，所以卡尔不在 $2$ 号或 $4$ 号座位；卡尔只能在 $1$ 号座位

“Bret is next to Carl” is false, so Carl is not in seat $2$ or seat $4;$ the only remaining seat for Carl is seat $1$

大提示：

卡尔在 $1$ 号座位后，“艾比在布雷特和卡尔之间”是假的，所以艾比不能在 $2$ 号座位；把艾比放进最后一个可行座位，再看剩下谁

Once Carl is in seat $1,$ “Abby is between Bret and Carl” is false, so Abby cannot be in seat $2;$ place Abby in the last open seat and see who is left

解答：

布雷特在 $3$ 号座位。因为“布雷特挨着卡尔”是假的，卡尔不在 $2$ 号或 $4$ 号座位，所以卡尔必须在 $1$ 号座位。

布雷特（ $3$ 号）和卡尔（ $1$ 号）之间的座位是 $2$ 号。因为“艾比在布雷特和卡尔之间”是假的，艾比不在 $2$ 号，所以艾比必须在 $4$ 号。

因此达娜坐在 $2$ 号座位。

所以正确答案是 D。

Bret is in seat $3.$ Since “Bret is next to Carl” is false, Carl is not in seat $2$ or seat $4,$ so Carl must be in seat $1.$

The seat between Bret (seat $3$ ) and Carl (seat $1$ ) is seat $2.$ Since “Abby is between Bret and Carl” is false, Abby is not in seat $2,$ so Abby must be in seat $4.$

That leaves Dana in seat $2.$

Thus, the correct answer is D .

1987 AMC 8 第 17 题

答案：D

难度评级：1060

小提示：

大提示：

解答：

其他年份的第 17 题