Which of the following numbers is a prime number? A. 25 B. 27 C. 29 D. 30 相关知识点: 试题来源: 解析 C。25 可以被 5 整除,27 可以被 3 整除,30 可以被 2、3、5 整除。而 29 只能被 1 和 29 整除,所以 29 是质数。反馈 收藏 ...
百度试题 结果1 题目What is not a prime number? A. 13 B. 17 C. 21 D. 23 相关知识点: 试题来源: 解析 C。本题考查质数的概念。21 可以分解为 3×7,所以它不是质数。13、17、23 都只能被 1 和自身整除,是质数。反馈 收藏
百度试题 结果1 题目Which of the following is a prime number? D A)71B)29C)41D)All of these E)None of these 相关知识点: 试题来源: 解析 D 反馈 收藏
百度试题 结果1 题目Which of the following is a prime number? A A)19B)18C)22D)15E)None of these 相关知识点: 试题来源: 解析 A 反馈 收藏
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4 is a factor,25!=4*1*2*3*5*6*...*25 25!指的是25阶乘=25*24*...*1 5显然是factor 6,7,8,9,10,...,25显然都是factor 26=2*13也是 27=3*3*3，25!中有3和9，所以也是factor 28=4*7,factor 29是prime 30=3*10 31prime 32=4*8,factor 33=3*11,factor 34=2*17,...
Why is 1 not a prime number? 1 is not a prime number because it has only one factor, namely 1. Prime numbers need to have exactly two factors. Why is 2 a prime number? 2 is a prime number because its only factors are 1 and itself. Is 51 a prime number? 51 is not a prime ...
Neither 0 or 1 is a prime number. Nor are they composite numbers. Because prime and composite numbers are only defined for integers that are larger than 1.
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...
No, 143 is not aprime number, it is in fact a composite number as it has more than two factors. Prime numbers are a fascinating topic in mathematics. They are the building blocks of all positive integers and have a special status in number theory. ...