作业帮没读懂的题请翻译1 If a and b are positive and 7a-5=2.what is the gre
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没读懂的题请翻译
1 If a and b are positive and 7a-5=2.what is the greatest possible value of ab.为什么是10而不是2?
2 If n is an integer,then the units digit of CANNOT be
A 0 B 2 C 4 D 5 E 6 why choose please translate the question.
3 The product of two consecutive positive integers CANNOT be__?
A a prime number B divisible by 11 C a multiple of 13 D an even number less than 10 E a number having 4 as its units digit Why choose E I cannot understand the meaning of
4 The daily rate for hotel room that sleeos 4 proplr is $39 for one person and X dollar for each additional person.If 3 people take the room for one day and each pays $21,what is the value of Why the answer is 12 rather than
5 If r and s are positive integers,each greter than 1,and if 11(s-1)=13(r-1),what is the least possible value of r+s?Why the answer is 26 rather than
1 If a and b are positive and 7a-5=2.what is the greatest possible value of ab.为什么是10而不是2?
2 If n is an integer,then the units digit of CANNOT be
A 0 B 2 C 4 D 5 E 6 why choose please translate the question.
3 The product of two consecutive positive integers CANNOT be__?
A a prime number B divisible by 11 C a multiple of 13 D an even number less than 10 E a number having 4 as its units digit Why choose E I cannot understand the meaning of
4 The daily rate for hotel room that sleeos 4 proplr is $39 for one person and X dollar for each additional person.If 3 people take the room for one day and each pays $21,what is the value of Why the answer is 12 rather than
5 If r and s are positive integers,each greter than 1,and if 11(s-1)=13(r-1),what is the least possible value of r+s?Why the answer is 26 rather than
i'm working on 4 and 5, give me a sec
1 If a and b are positive and 7a-5=2. what is the greatest possible value of ab. 为什么是10而不是2?
求的是最大值, 由第一个公式得出a=5, 两者相乘最大值是2×5=10.
2 If n is an integer, then the units digit of CANNOT be _?
A 0 B 2 C 4 D 5 E 6 why choose B?
如果n是整数,那么——【你有个公式没写出来吧?】的个位数不能是什么.看你题目的答案,是n^2吧? 没有任何数的平方是2结尾. 2的平方是4,5的平方是25,6的平方是36
3 The product of two consecutive positive integers CANNOT be__?
A a prime number B divisible by 11 C a multiple of 13 D an even number less than 10 E a number having 4 as its units digit Why choose E ? I cannot understand the meaning of E?
两个相邻的正数之积不能是?
素数 【可以,1乘2】
被11整除 【可以,11乘12】
13的倍数 【可以,12乘13】
一个小于10的偶数 【可以,2乘3】
个位数结尾是4. 【其他都可以,所以这个不可以】
4 The daily rate for hotel room that sleeos 4 proplr is $39 for one person and X dollar for each additional person. If 3 people take the room for one day and each pays $21, what is the value of X? Why the answer is 12 rather than 8?
三个人一共付款63元21*3 = 63
一个人的话是39元,所以多出来的两个人本身的价格是63-39=24,
所以每多出一个人是24÷2=12元
5 If r and s are positive integers, each greter than 1, and if 11(s-1)=13(r-1), what is the least possible value of r+s? Why the answer is 26 rather than 2?
再问： b>=5? b>=-1吧 Q2 If n is an integer, then the units digit of n^2 CANNOT be _? How about q4 and q5.
再答： sorry 第一题我脑抽- - 我估摸题目有问题。。 Four is up there. give me a sec to read 5.. sorry i'm slow -_- these are gre questions no? For question 5... it won't be two.. because the statement said... 【each greter than 1】, the only condition that satisfies r+s = 2, is iff r=s=1。。。
再问： 是GRE
再答： 第五题答案在上面
1 If a and b are positive and 7a-5=2. what is the greatest possible value of ab. 为什么是10而不是2?
求的是最大值, 由第一个公式得出a=5, 两者相乘最大值是2×5=10.
2 If n is an integer, then the units digit of CANNOT be _?
A 0 B 2 C 4 D 5 E 6 why choose B?
如果n是整数,那么——【你有个公式没写出来吧?】的个位数不能是什么.看你题目的答案,是n^2吧? 没有任何数的平方是2结尾. 2的平方是4,5的平方是25,6的平方是36
3 The product of two consecutive positive integers CANNOT be__?
A a prime number B divisible by 11 C a multiple of 13 D an even number less than 10 E a number having 4 as its units digit Why choose E ? I cannot understand the meaning of E?
两个相邻的正数之积不能是?
素数 【可以,1乘2】
被11整除 【可以,11乘12】
13的倍数 【可以,12乘13】
一个小于10的偶数 【可以,2乘3】
个位数结尾是4. 【其他都可以,所以这个不可以】
4 The daily rate for hotel room that sleeos 4 proplr is $39 for one person and X dollar for each additional person. If 3 people take the room for one day and each pays $21, what is the value of X? Why the answer is 12 rather than 8?
三个人一共付款63元21*3 = 63
一个人的话是39元,所以多出来的两个人本身的价格是63-39=24,
所以每多出一个人是24÷2=12元
5 If r and s are positive integers, each greter than 1, and if 11(s-1)=13(r-1), what is the least possible value of r+s? Why the answer is 26 rather than 2?
再问： b>=5? b>=-1吧 Q2 If n is an integer, then the units digit of n^2 CANNOT be _? How about q4 and q5.
再答： sorry 第一题我脑抽- - 我估摸题目有问题。。 Four is up there. give me a sec to read 5.. sorry i'm slow -_- these are gre questions no? For question 5... it won't be two.. because the statement said... 【each greter than 1】, the only condition that satisfies r+s = 2, is iff r=s=1。。。
再问： 是GRE
再答： 第五题答案在上面
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