quiz of the day: how many days
学校一个宿舍住着9个人,校方规定每晚最多3人外出。
问题:每人都和任一他人一起外出一次最少要几天?
死生契阔,与子成说。执子之手,与子偕老。
第一次,我下夜班回家,已经很晚了,我在卫生间洗嗽,忽然听到门口有动静。好象是有人在门口撬我的锁。于是我大喝一声:"谁,干什么?"谁知道那贼却在门口答道:这么晚了还不睡觉,搞什么搞。说完就没有声音了。我一时不知所措......
一位先生和一个聪明的学生正在散步,迎面来了三个先生的熟人。
A group of four persons, called P1, P2, P3 and P4, have to cross a bridge at night. It is dark and they can only cross the bridge if they carry a lamp. Only one lamp is available and at most two persons can cross at the same time. Therefore any solution requires that, after the first two persons cross the bridge, one of them returns, bringing back the lamp with him for the remaining people. The four persons have different maximal speeds: here P1 crosses in 5 time units (t.u.), P2 in 10 t.u., P3 in 20 t.u. and P4 in 25 t.u. When a pair crosses the bridge, they move at the speed of the slowest person in the pair. how could u move the whole group to the other side of the bridge in 60 t.u?
师:“待人接物”这个成语怎么解释?
There are ten groups of coins, with 10 coins in each group. The standard weight of each coin is 1.0g. However, in one of the group, all 10 coins are 0.9g each. You are asked to use a scale only once to find out which group has the lighter coins.
盘古说:我开;女娲说:我补;共工说:我撞;神农说:我尝;精卫说:我填;夸父说:我追;后羿说:我射;嫦娥说:没射着!
警察给人的印象一般是威风凛凛、智勇双全的,但警察也是人,他们在日常工作和生活中也会遇上难以预料的事。下面这些有趣、巧合、古怪的事,就是发生在警察身上的真实故事。
一个遇车祸生命危在旦夕的人被抬进急诊室,大夫将会怎样救治呢?
1.在楼梯上跌倒了,嘴里说着倒霉,用最快的速度爬了起来。看看周围, 还好,没有人看到。突然,发现一个问题,我刚才,到底是在上楼?还是下楼?-_-
There are 25 horses. And there is only one racing track. This racing track can only race at most five horses at a time. Assume that you do not have timer. You can only determine which horse run faster by your eye. Also assume that each horse always run the same constant speed (yes, if the horse run 10mph, then it will always stay constant at 10mph) and no two or more horses run the same speed (yes, none of them will tie). How many times (fewest possible) do you need to race to get the fastest 3 horses?
我的老婆虽然既不漂亮也不温柔,但是有一个优点,那就是智力超群。她有着超常的判断力和逻辑思维能力,常作惊人之语,让我佩服得五体投地。生活虽然平淡,她的妙语时不时能给我一点意想不到的惊喜,为了和大家分享我的惊喜,特地总结了一下她比较著名的言论,举出最让我佩服的十大例子:
有三个人,都会划船.
Commandment 1.
Once upon a time at Stanford, a professor gave a test to 2 students: Matt and Ruth. The professor picked a card from a deck of 18 cards. He told Matt the suit of the card, and told Ruth the number of the card. Then the professor showed both Matt and Ruth all the 18 cards:
亲爱的浅浅,鉴于你在你爷爷奶奶姥姥姥爷的纵容之下胡作非为,我跟你妈研究后决定对你断奶三天以示惩罚,并留家查看以观后效!我们家是法制家庭,决定对你实行法制管理,经爸妈立法委员会研究讨论,制定了浅浅家规21条,现颁布如下:
It might be fun to put some jokes here so that friends can rest a little. :)