GWD1-M26,30,34

[Quinton]

Q26
If the units digit of the three-digit positive integer k is nonzero, what is the tens digit of k?
(1) The tens digit of k + 9 is 3.
(2) The tens digit of k + 4 is 2.



Q30:
The total cost of an office dinner was shared equally by k of the n employees who attended the dinner. What was the total cost of the dinner?
(1) Each of the k employees who shared the cost of the dinner paid $19.
(2) If the total cost of the dinner had been shared equally by k + 1 of the n employees who attended the dinner, each of the k + 1 employees would have paid $18.



Q34
In the xy-plane, what is the slope of line l?
(1) Line l dose not intersect the line with equation y = 1 - x.
(2) Line l intersects the line with equation y = x – 1.

[魚]

超人

一題一帖喔

.....降以後做連結統整的時比較方便咩 ~ (H)

[huacy]

http://www.formosamba.com/phpBB3/viewtopic.php?t=1030

[Quinton]

超人

一題一帖喔

.....降以後做連結統整的時比較方便咩 ~ (H)

啊∼我忘了 :-$
SORRY!!

也謝謝站大的連結！！
我會先把那個加入最愛∼
以後有問題先去那找！！

謝謝大家不嫌棄∼AT新手！！

[魚]

Q26
If the units digit of the three-digit positive integer k is nonzero, what is the tens digit of k?
(1) The tens digit of k + 9 is 3.
(2) The tens digit of k + 4 is 2.

100X p + 10 XQ +R=K

(1) 10Q+9 之個位 為 3 ==> Q 一定為 4

(2) 10Q +4[tab][tab]2 ==> Q [tab] 8

答案應該是D吧[tab]

[Quinton]

100X p + 10 XQ +R=K

(1) 10Q+9 之個位 為 3 ==> Q 一定為 4

(2) 10Q +4[tab][tab]2 ==> Q [tab] 8

答案應該是D吧[tab]

答案是Aㄟ！！想不通！！ @@@

[Quinton]

想通了∼

因為末位數不可為0（最小是1）所以加上9一定會近位！所以10位數可以確定！

但是∼若加上4而以∼不見得可以近位∼所以答案不是唯一！

這樣應該就是『A』了！

[魚]

想通了∼

因為末位數不可為0（最小是1）所以加上9一定會近位！所以10位數可以確定！

但是∼若加上4而以∼不見得可以近位∼所以答案不是唯一！

這樣應該就是『A』了！

咦 , 1-9 的數值中 加四=2

的 只有8 耶 :o

[Quinton]

重點應該是在近位與否啦！
妳把10位數少看了∼（他不是問加4之後個位數是不是只有2）

[Quinton]

幫我想想Q30嚕！
那題在題庫裡面還沒有人問過！

感恩啊！！

[魚]

不對 啊 ! 我剛剛連過去看過了 , :-$ (真丟臉 想死想死)

我當時對那道題的理解是錯的吧 (H)

2) The tens digit of k + 4 is 2.

是說 K的十位數 (所以是一個0-9的數字) + 4 之後 ,這個數字會變成2耶

站大 還有版主s 快來幫忙吧 (li)

[魚]

Q30:
The total cost of an office dinner was shared equally by k of the n employees who attended the dinner. What was the total cost of the dinner?
(1) Each of the k employees who shared the cost of the dinner paid $19.
(2) If the total cost of the dinner had been shared equally by k + 1 of the n employees who attended the dinner, each of the k + 1 employees would have paid $18.

已知 total =kn

(1)kn=kX19 ........無法得知total
(2)kn=(k+1)18....無法得知total
......................................................(1)(2)聯立

可解 故...答案為 C.................................(吧 :P )

[魚]

Q34
In the xy-plane, what is the slope of line l?
(1) Line l dose not intersect the line with equation y = 1 - x.
(2) Line l intersects the line with equation y = x – 1.

(1) 不相交 ....那就是平行嚕.....即得斜率
(2) 相交@@...這個條件什麼都不能球吧

答案應該是................A....................(吧)

[Quinton]

Q34
In the xy-plane, what is the slope of line l?
(1) Line l dose not intersect the line with equation y = 1 - x.
(2) Line l intersects the line with equation y = x – 1.

(1) 不相交 ....那就是平行嚕.....即得斜率
(2) 相交@@...這個條件什麼都不能球吧

答案應該是................A....................(吧)

不相交∼就是平行？！
有這樣的規定嗎？！
還是我沒看清楚題目？！ @@@

[Quinton]

Q30:
The total cost of an office dinner was shared equally by k of the n employees who attended the dinner. What was the total cost of the dinner?
(1) Each of the k employees who shared the cost of the dinner paid $19.
(2) If the total cost of the dinner had been shared equally by k + 1 of the n employees who attended the dinner, each of the k + 1 employees would have paid $18.

已知 total =kn

(1)kn=kX19 ........無法得知total
(2)kn=(k+1)18....無法得知total
......................................................(1)(2)聯立

可解 故...答案為 C.................................(吧 :P )

這題OK嚕！

謝謝嚕！