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 ...
What number is neither a prime or composite number? What number is neither prime nor composite? What are all the composite numbers up to 1000? What are the composite numbers between 1 and 10? What are the composite numbers between 10 and 20?
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...
解析 D The factors of 49 are1,7 , and49, Since 49 has 3 factors, it has a prime number of factors. 下列哪个数的整数因子的个数是质数( ). A.6 B.12 C.36 D.49 49的因数是1,7和49,因为49有3个因数,所以它的因数个数是质数. 故选D....
Express each of the following numbers as the sum of three odd primes: (a) 21 (b) 31 (c) 53 (d) 61 View Solution Which of the following is a prime number? (a) 203 (b) 139 (c) 115 (d) 161 View Solution Which of the following are not twin-primes?
Given p and q are two distinct prime numbers greater than 2 which of the following could be a whole number? {eq}\displaystyle (a) \ \frac{2p}{q} \ \ (b) \ \frac{p^2}{q} \ \ (c) \ \frac{p}{q+1} \ \ (d) ...
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 can be written as the product of two different prime numbers? A: B: C: D: 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. ,选....
百度试题 结果1 题目Is prime?Which of the following numbers are prime?21,11,18,25x=11 相关知识点: 试题来源: 解析 x=11Step-by-step explanation:21 =3·718=3·625=5·5x = 11 反馈 收藏
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...