百度试题 结果1 题目【题目】Which of the following numbers is prime?() A. 1 B. 55 C. 71 D. 1617 E. 3334 相关知识点: 试题来源: 解析 【解析】 C 反馈 收藏
Which of the following numbers are prime ? Why/ why not ? (a) 7 (b) 1 (c) 2 (d) 47 (e) 97 (f) 2011 (g) 111111
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...
Which of the following is neither prime nor composite number? View Solution The number which is neither prime nor composite is View Solution Fill in the blanks: The number which is neither prime nor composite is ……. View Solution Exams ...
On prime numbers, for which (almost) all fermat numbers are quadratic non-residuesIt is well known that 3, 5, 7 are such primes. But in higher regions they appear only very rare. There exist many residue classes without such primes. Also other conditions for their existence are given. ...
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...
If p and r are prime numbers,which of the following must also be prime A. pr B. p+rC. pr+1 D. p2+r2E. None of the above 相关知识点: 试题来源: 解析E 若p和r是质数(prime number),则下面哪一个也一定是质数 此题可用排除法。质数就是除了1和它本身之外,没有其他因子的数,因此(A)...
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
Problem Solving 试题详情 题目: Fermat primes are prime numbers that can be written in the form, where k is an integer and a power of 2. Which of the following is NOT a Fermat prime 选项: A、35 B、17 C、31 D、257 答案: D