Prime numbers are any numbers that cannot be evenly divided by any integer other than 1 and itself. Or in other words, the only numbers that you can multiply to get a prime number are 1 and the prime number. Numbers that are not prime, or those with additional factors other than 1 and...
1. Which of the numbers below cannot be expressed as a sum of two prime numbers?(A)19(B)20(C)21(D)22(E)23 相关知识点: 试题来源: 解析 1.答案:(E). 解 19=2+17、20=3+17、21=2+19 、22=3+19,而若能将23表示成两个质 数之和,这两个质数必为一奇一偶,故偶质数必为2,因此奇...
试题来源: 解析 (1)101 is a prime number.(2)123 is not a prime number as it is divisible by 3.(3)127 is a prime number.(4)133 is not a prime number as it is divisible by 7. (1)N/A.(2)N/A.(3)N/A.(4)N/A.反馈 收藏 ...
(1) Four different prime numbers are factors of 2n. (2) Four different prime numbers are factors of n2n2 . 选项: A、 Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B、 Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. ...
A prime number is a positive integer having exactly two factors. If p is a prime, then the only factors it can have are 1 and p. Any number that does not fall into this category is said to as a composite number, meaning it may be factored into other posi
Data Sufficiency 试题详情 题目: Ifp,s, andtare positive prime numbers, what is the value ofp3s3t3? (1)p3st= 728 (2)t= 13 选项: 答案: A 经典答疑 发起提问 提问: 点此查看答疑 一道有关素数的数学题 评分:0 浏览:666 提交
Line up the natural numbers 1, 2, 3, …, 99, 100 that are both odd and composite numbers, so that every two adjacent numbers are not prime.. 相关知识点: 试题来源: 解析 See the answer . Odd composite number: 9, 15, 21, 25, 27, 33, 35, 39, 45, 49, 51, 55, 57, 63, ...
Which of the following numbers is a prime number? A. 12 B. 15 C. 17 D. 18 相关知识点: 试题来源: 解析 C。本题考查质数的概念。质数是指一个大于 1 的自然数,除了 1 和它自身外,不能被其他自然数整除的数。12 可以被 2、3、4、6 整除;15 可以被 3、5 整除;18 可以被 2、3、6、...
If x and y are different prime numbers, each greater than 2, which of the following must betrue? I II x - y is an even integer. III is not an integer. 选项: A、II onlyI and II only B、I and III only C、II and III only...
prime numbers is simple and beautiful发布于 2021-11-20 09:30 内容所属专栏 偶数哥德巴赫猜想 ‘1+1’ 的探讨验证 摸清偶数所含‘1+1’个数和孪生素数的底数和构成 订阅专栏 Numbers 孪生素数 黎曼猜想(Riemann Hypothesis) 赞同5添加评论 分享喜欢收藏申请转载 ...