百度试题 结果1 题目Of 29, 31,39, 43,51, 57,61, 87, 91 and 97, which are prime numbers? 相关知识点: 试题来源: 解析反馈 收藏
If p and r are prime numbers, which of the following must also be prime? A. pr B. p+r C. pr+1 D. p2+r2 E. None of the above 相关知识点: 试题来源: 解析E 正确答案:E 解析:若p和r是质数(prime number),则下面哪一个也一定是质数?解:本题的正确答案为(E)。此题可用排除法。质数...
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、...
Which of the following numbers is prime? ( ) A. B. C. D. E. None of these 相关知识点: 试题来源: 解析 E Prime numbers are whole numbers that have exactly two different factors. Of the answer choices: is not a whole number. has many factors. has only one factor.反馈 收藏...
Which of the following numbers is prime ? View Solution Which of the following numbers is prime View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions KC Sinha Solutions for Maths Cengage Solutions for Maths
1000001, ... Are these numbers prime? If not, find the one smallest among them, which is,not prime and factor it into primes. 相关知识点: 试题来源: 解析 In[120]:= {#, FactorInteger@#} &@ Select[Table[10^i + 1, {i, 0, 1400}], Not[PrimeQ@#] &, 1]Out[120]= {{1001},...
Which of the following can be written as the product of two different prime numbers?A. 8 B. 47 C. 49 D. 91 相关知识点: 试题来源: 解析 D 下面哪个数可以被写成两个不同的质数的乘积? 重点单词:Product,乘积;prime number,质数;composite number,合数. 91=7×13,选D....
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
百度试题 结果1 题目Which of the whole numbers 15, 23, 51, and 59 are prime numbers?相关知识点: 试题来源: 解析 23 and 59.反馈 收藏
If x and y are different prime numbers, each greater than 2, which of the following must be true ?()Ⅰx+y≠91 Ⅱx-y is an even integer. Ⅲ is not an integer. A.条件(1)充分,但条件(2)不充分. B.条件(2)充分,但条件(1)不充分. C.条件(1)和(2)单独都不充分,但条件(1)和条件(...