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[Issue Essay]

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题目:

Analytical!

选项:

答案:

提问:

PS:俩骰子每面各是1-6,且每投一次各个数字冲上的概率一致。问同时扔这俩,俩加和是9或者5的概率?选了2/9。 老师您好,解析给是:共有6*6=36种,等于9的情况3+6,4+5,5+4,6+3。等于5的情况1+4,2+3,3+2,4+1。一共8个,所以是8/36=2/9。这是考虑了顺序的,8种情况是考虑到顺序,但我觉得不应该考虑顺序,应该只有4种。请指点。

解答:

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阅读339552
解答: sysadmin

提问:

PS:问49.987*9.879/0.253化简结果最接近哪一个? 选项a.b.c忘记了,d是1700,e是1800

解答:

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阅读336898
解答: sysadmin老师

提问:

数学书60页32题,有多少小于20的正整数等于3的正倍数与4的正倍数只和,答案说10个,我怎么查都是11个

解答:

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阅读336617
解答: sysadmin老师

提问:

PS:一个数是两位数,这个数大于11,个位数和十位数加起来的和是质数,问这样的 数有多少个?

解答:

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阅读336474
解答: sysadmin老师

提问:

57)If m is a positive odd integer between 2 and 30, then m is divisible by how many different positive prime numbers? 1)m is not divisible by 3. 2)m is not divisible by 5. 条件1 我理解的是 M 只能2到30之间,那么就有5,7,11,13,17,19,23,29,这么多个prime numbers. 条件2 我理解的是 M 可以是 3,7,9,11,13,17,19,21,23,27,29 这些,21可以被3和7除, 我判断条件1完全可以,条件2 我不太确定

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阅读336655
解答: sysadmin老师

提问:

62)if d is the positive integer and f is the product of the first 30 positive integers what is the value of d? (1) 10d is a factor of f. (2) d > 6 这个题目说d 是一个正整数,f 是30!阶乘,d的值多少, 这个题应该怎么推理?

解答:

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阅读336687
解答: sysadmin老师

提问:

DS:说一个整数N,最大不超过50,把从1到N的所有数拉出来列一起,数字里出现4的数字有几个? 条件1:这些数里出现0的个数是出现4的个数的数字少11; 条件2:说N这个数是某个prime number的平方

解答:

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阅读336222
解答: sysadmin老师

提问:

错选了D,麻烦老师分析一下这题的时态!

解答:

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阅读336008
解答: sysadmin老师

提问:

错选了最后一个,麻烦老师讲解一下!

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阅读335593
解答: sysadmin老师

提问:

老师麻烦讲解这道题 Making things even more difficult has been general market inactivity lately, if not paralysis, which has provided little in the way of pricing guidance. A has been general market inactivity lately, if not paralysis, which has provided B there is general market inactivity, if not paralysis, lately it has provided C general market inactivity, if not paralysis, has lately provided D lately, general market inactivity, if not paralysis, has provided E is that lately general market inactivity, if not paralysis, which provides

解答:

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阅读335517
解答: sysadmin老师

提问:

讲解~

解答:

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阅读335519
解答: sysadmin老师

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