[求助]prep 数学数学不好

andylouis · 发表于 2007-9-21 15:50:00

[attachimg]60925[/attachimg]
[attachimg]60927[/attachimg]
最后一个

DS if x ,y, z,are positive integers ,what is the remainder when 100x+10y+z is divided by 7

1)y=6 2) z =3

随便求教高人快考了数学这么烂怎么办啊？？？、

[此贴子已经被作者于2007-9-21 15:55:14编辑过]

happyrosej · 发表于 2007-9-21 16:48:00

看不见啊

andylouis · 发表于 2007-9-21 16:52:00

你把图点一下就放大了

moo_moo_cow · 发表于 2007-9-21 17:36:00

(1) 5000 x 0.08 /0.065 = 6154 (approx.)

(2) the answer is E because we do not know the balance of 500 in the account is before or after the
withdrawl of 1000 dollars.

(3) 40/60x30=20 miles; (20+5)/(30+20) = 0.5 miles/min. Convert it to miles/hour will be 30.

(4) B. Condition 2 alone is sufficient.

moo_moo_cow · 发表于 2007-9-21 18:04:00

以下是引用moo_moo_cow在2007-9-21 17:36:00的发言：

(1) 5000 x 0.08 /0.065 = 6154 (approx.)

(2) the answer is E because we do not know the balance of 500 in the account is before or after the
withdrawl of 1000 dollars.

(3) 40/60x30=20 miles; (20+5)/(30+20) = 0.5 miles/min. Convert it to miles/hour will be 30.

(4) B. Condition 2 alone is sufficient.

Please ignore my answer for (4), the correct answer should be E.

andylouis · 发表于 2007-9-21 19:13:00

谢谢能帮我翻译一下第2题吗比较猪头题读的不是很懂

(3) 40/60x30=20 miles; (20+5)/(30+20) = 0.5 miles/min. Convert it to miles/hour will be 30.

为甚么＋5

[此贴子已经被作者于2007-9-21 19:15:21编辑过]

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