What is the r语言 is.factorr of 4?

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英语翻译英语数学名题选编1)If n is an integer,which of the following cannot be a factor of 3n+4?(A) 4 (B) 5 (C) 6 (D) 72)If the sum of the first n positive integers is S,what is the sum of the first n positive even integers,in terms of 3)In how many of the integers between 1 and 100 does the digit 5 occur exactly once?4)If r and s are positive integers,each greater than 1,and if 11(s-1)=13(r-1),what is the least possible value of r+s?5)If Art and Rita can do a job in 4 hours when working together at their respective constant rates and Art can do the job alone in 6 hours ,in how many hours can Rita do the job alone?6)If 10 persons meet at a reunion and each person shakes hands exactly once with each of the others,what is the total number of handshakes?7)Raffle tickets numbered consecutively from 101 through 350 are placed in a box.What is the probability that a ticket selected at random will have a number with a hund- reds digit of 8)If 75 percent of a class answered the first question on a certain test correctly,55 percent answered the second question on the test correctly,and 20 percent answered neither of the questions correctly,what percent answered both correctly?9)How many two-element subsets of {1,2,3,4} are there that do not contain the pair of elements 2 and 10)In how many arrangements can a teacher seat 3 girls and 3 boys in a row of 6 seats if the boys are to have the first ,third,and fifth seats?11)A necklace is made by stringing N individual beads together in the repeating pattern red bead,green bead,white bead,blue bead,and yellow bead.If the necklace design begins with a red bead and ends with a white bead,then N could equal?(A) 16 (B) 32 (C) 68 (D) 5412)If C is the temperature in degrees Celsius and F is the temperature in degrees Fahrenheit,then the relationship between temperatures on the two scales is expressed by the equation 9C=5(F-32).On a day when the temperature extremes recorded at a certain weather station differed by 45 degrees on the Fahrenheit scale,by how many degrees did the temperature extremes differ on the Celsius scale?如果给出答案就更好了!如果给出答案就更好了!如果给出答案就更好了!
散粉是符合0398
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1,如果n是一个整数,下列哪个不可能是3n+4的因子?B(A) 4 (B) 5 (C) 6 (D) 7 2,如果前n个正整数的和是S,那么前n个正偶数的和用S表示为什么?2S3,在多少个1到100之间的整数中,阿拉伯数字5只出现一次?94,如果r和s是正整数,且都大于1,如果11(s-1)=13(r-1),那么r+s的最小可能值是多少?55,如果Art和Rita以他们各自的速度共同做一份工作需4小时,Art单独作需6小时,那么Rita单独做需几小时?126,如果10个人相见,每个人都要和其他人握一次手,那么总共握手多少次?457,写有101到350的卡片放在一个箱子里,随机抽出一张,百位是2的可能性有多大?40%8,一次考试中,75%的人正确回答了第一题,55%的人正确回答了第二题,20%的人一道题也没有回答正确,那么,有多少人两道题全都答对了?9,集合{1,2,3,4}除了{2,4}以外的两个元素的子集有多少个?510,共有3男3女要坐6个座位,如果让3个男生坐第一,三,五号座位,那么有多少种排列方式?11,一条项链由N个珠子组成,顺序是红,绿,白,蓝,黄,如此反复.如果项链以红色珠子开头以白色珠子结尾,那么N是多少?C(A) 16 (B) 32 (C) 68 (D) 5412,如果C是摄氏温标,F是华氏温标,两者的关系是9C=5(F-32).如果一天测量温度的华氏温度的误差为45度,那么相应的摄氏温度的误差是多少?65/9
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