解下列奥数题:答对者给予80分奖励!加油!1.某次猜谜语比赛,谜语按难易分两类,每人可以猜三条.每猜对一题较难的谜语得3分,每猜对一条较容易的谜语得1分.如果有8人得1分,7人得2分,6人得3分,
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![解下列奥数题:答对者给予80分奖励!加油!1.某次猜谜语比赛,谜语按难易分两类,每人可以猜三条.每猜对一题较难的谜语得3分,每猜对一条较容易的谜语得1分.如果有8人得1分,7人得2分,6人得3分,](/uploads/image/z/3637576-64-6.jpg?t=%E8%A7%A3%E4%B8%8B%E5%88%97%E5%A5%A5%E6%95%B0%E9%A2%98%EF%BC%9A%E7%AD%94%E5%AF%B9%E8%80%85%E7%BB%99%E4%BA%8880%E5%88%86%E5%A5%96%E5%8A%B1%21%E5%8A%A0%E6%B2%B9%211.%E6%9F%90%E6%AC%A1%E7%8C%9C%E8%B0%9C%E8%AF%AD%E6%AF%94%E8%B5%9B%2C%E8%B0%9C%E8%AF%AD%E6%8C%89%E9%9A%BE%E6%98%93%E5%88%86%E4%B8%A4%E7%B1%BB%2C%E6%AF%8F%E4%BA%BA%E5%8F%AF%E4%BB%A5%E7%8C%9C%E4%B8%89%E6%9D%A1.%E6%AF%8F%E7%8C%9C%E5%AF%B9%E4%B8%80%E9%A2%98%E8%BE%83%E9%9A%BE%E7%9A%84%E8%B0%9C%E8%AF%AD%E5%BE%973%E5%88%86%2C%E6%AF%8F%E7%8C%9C%E5%AF%B9%E4%B8%80%E6%9D%A1%E8%BE%83%E5%AE%B9%E6%98%93%E7%9A%84%E8%B0%9C%E8%AF%AD%E5%BE%971%E5%88%86.%E5%A6%82%E6%9E%9C%E6%9C%898%E4%BA%BA%E5%BE%971%E5%88%86%2C7%E4%BA%BA%E5%BE%972%E5%88%86%2C6%E4%BA%BA%E5%BE%973%E5%88%86%2C)
解下列奥数题:答对者给予80分奖励!加油!1.某次猜谜语比赛,谜语按难易分两类,每人可以猜三条.每猜对一题较难的谜语得3分,每猜对一条较容易的谜语得1分.如果有8人得1分,7人得2分,6人得3分,
解下列奥数题:答对者给予80分奖励!加油!
1.某次猜谜语比赛,谜语按难易分两类,每人可以猜三条.每猜对一题较难的谜语得3分,每猜对一条较容易的谜语得1分.如果有8人得1分,7人得2分,6人得3分,5人得4分,4人得5分.恰好猜对两题谜语的有几人?
2.A certain make of pen(一种牌子的钢笔)was priced 50 cents in the store but found few buyers. Then the store had reduced the price (减价,降价),the whole remaining stock (存货)was sold for $31.93. What was the retuced price?
3.If r and s are integers,each greater than 1, and if 11(s—1)=13(r—1),what is the least possible value (最小值)of +s?
解下列奥数题:答对者给予80分奖励!加油!1.某次猜谜语比赛,谜语按难易分两类,每人可以猜三条.每猜对一题较难的谜语得3分,每猜对一条较容易的谜语得1分.如果有8人得1分,7人得2分,6人得3分,
1、因为猜对2题的人只有3种情况:A、猜对2条1分题;B、猜对2条3分题;猜对1分、3分题各一题,依题意可知答案为:7+5=12人
2、将31.93乘以100得3193,3193=31×103,
即31.93=31×1.03=3.1×10.3=0.31×103,所以降价后的价格可以是:31、1.03、3.1、10.3、0.31、103其中一个
而只有$0.31是小于原价$0.50的,所以降价后的价格是$0.31
3、最后问题问的看不懂,
因为11(s—1)=13(r—1),且s、r都是大于1的整数,所以s-1的最小整数值是13,所以s的最小值是14,同理,r-1的最小值是11,r的最小值是12
8个1是只猜对1道
7个2是猜对两道
6个3,要么是猜对三个,要么猜对一个
5个4,猜对1个一分,猜对一个三分
4个5,猜对一个三分,猜对两个1分
所以答对两题的是7+5=12
(1)12 (3)26
一,某次猜谜语比赛,谜语按难易分两类,每人可以猜三条。每猜对一题较难的谜语得3分,每猜对一条较容易的谜语得1分。如果有8人得1分,7人得2分,6人得3分,5人得4分,4人得5分。恰好猜对两题谜语的有几人?
二,.A certain make of pen(一种牌子的钢笔)was priced 50 cents in the store but found few buyers. Then ...
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一,某次猜谜语比赛,谜语按难易分两类,每人可以猜三条。每猜对一题较难的谜语得3分,每猜对一条较容易的谜语得1分。如果有8人得1分,7人得2分,6人得3分,5人得4分,4人得5分。恰好猜对两题谜语的有几人?
二,.A certain make of pen(一种牌子的钢笔)was priced 50 cents in the store but found few buyers. Then the store had reduced the price (减价,降价),the whole remaining stock (存货)was sold for $31.93. What was the retuced price?
If r and s are integers,each greater than 1, and if 11(s—1)=13(r—1),what is the least possible value (最小值)of +s?
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