If a number is divisible by two numbers at the same time, it must be divisible by their least common multiple. 相关知识点: 试题来源: 解析 正确 设该数为N,a和b为两个除数。若N能被a和b整除,则N是a和b的公倍数。根据最小公倍数的定义,任何公倍数必为最小公倍数的倍数。因此,N一定能被a...
Definition. A prime number is a positive integer with exactly two positive divisors. If p is a prime then its only two divisors are necessarily 1 and p itself, since every number is divisible by 1 and itself. Are prime factors and prime divisors the same? The prime factorization of a num...
A prime number is simply a number that is only divisible by itself and 1. Any number that is not prime is called a composite number. 1 is considered to be neither prime nor composite. So 2, 3, 5, 7, and 11 are all prime numbers. 2 is the only even prime number as all even nu...
must be divisible by all the following numbers except ( ).A. 6 B. 4 C. 2 D. 1 相关知识点: 试题来源: 解析 A A number divisible by 8(such as 8)may not be divisible by 6, but is divisible by 1,2, and 4. 下列哪个数字不能被8整除( ). A.6 B.4 C.2 D.1 可以被8整除的...
The smallest prime number is 2 because it is divisible by itself and 1 only. Finding Prime Numbers Using Factorization The most common method used to find prime numbers is by factorization method. The steps involved in finding prime numbers using the factorization method are: Step 1: First ...
结果1 题目Which of the following numbers are divisible by 2?Which ones are divisible by 5? Which ones are divisible by 4?234 789 7756 8865 3728 8064 相关知识点: 试题来源: 解析 能被2整除:234,7756,3728,8064.能被5整除:8865;能被4整除:7756,3728,8064. 被2整除:末尾是2,4,6,8,0;被4...
A prime number is a number greater than 1, which is only divisible by 1 and itself. Show Step-by-step Solutions Recognizing prime and composite numbers Example: Determine whether the following numbers are prime, composite or neither: 24, 2, 1, 17 ...
1 Working with numbers 1Workingwithnumbers Numbersystems Naturalnumber(N)WholenumbersIntegersPositiveintegersNegativeintegersEvennumbersOddnumbersPrimenumbers-naturalnumbersthataredivisibleby1andthenumberitselfthesesnumbershaveonlytwofactors1,2,3,4,5,…0,1,2,3,4,5,……,-5,-4,-3,-2,-1,0,1,2,3,4...
529 is not a prime number since it can be divided by numbers other than 1 and itself. Are the following numbers prime numbers? (1) 137. (2) 271. (3) 337. (4) 437. (5) 507. (6) 741. 相关知识点: 试题来源: 解析(1) 137 is a prime number. (2) 271 is a prime num...
F. F&rend, " On sequences of numbers not divisible one by another ", J. London Math. SOC., 10 (1935), 42-44.F. Behrend, “On sequences of numbers not divisible by one another”, J. London Math. Soc. , 10, 1935, 42–44....