解析 C For example:2、3、5、7 are all primes,2+3=5,2+5=7,5 and 7 are prime and odd number;3+5=8,3+7=10,8和10 are composite number and even number.So the sum of two prime numbers will be an odd or even number.So we choose \text{C}....
2 The product of several prime numbers must be ()(A)a prime number(B)a composite number(C)an odd number(D)an even number2 The product of several prime numbers must be() (A)a prime number (B)a composite number (C)an odd number (D)an even number 答案 2-|||-B优质解答 结果二...
If x is a prime number,y is an integer,and x21-x=2y2+3,then xy2=( )(英汉小辞典:prime number 质数,integer:整数) A. 8 B. 16 C. 32 D. 64 相关知识点: 试题来源: 解析 C 试题分析:先根据x是质数判断出21-x是质数,故x21-x一定是质数;再根据y是整数可知y2一定是合数,故y2+3一...
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In a recent issue of Croatica Chemica Acta, a very interesting essay by L. Pogliani, M. Randi} and N. Trinajsti} dealing with the number thirteen1 was published. In the essay, among other things, an example of an unusual alphanumerical notation of one of the authors' family names is ...
Example of a Prime Brokerage Hedge Fund ABC just launched with $75 million that it raised from investors. It is a small hedge fund that employs 15 people. The majority of these individuals are traders,researchers, and a few administrative people. The fund has limited resources that it can al...
If a die is rolled and it shows an even number, the probability of getting a prime number on the next roll is 2/3. What is the probability of getting a non-prime number on the next roll given that the first roll was even? A. 1/3 B. 2/3 C. 1/2 D. 3/4 相关知识点: ...
LetNbe a large even number andV(m)the number of prime divisors ofm. In 1948, Hungarian mathematician A. Rényi [1] has proved thatN=a+b, whereV(a) = 1andV(b) ≤Kin whichKis an absolute constant. Under the assmuption of the Riemann hypothesis, Wang Yuan [2] has established that...
若P是比11大的质数(prime number),且p等于两个质数x,y的和.则x可能是下而的哪一个 考生在解答此题时.应比较熟悉质数、奇数与偶数之间的相互关系。P是比11大的质数,所以P必是奇数。而P同时又是两质数的和,由于一个奇数只可能是一个奇数与一个偶数之和,故x、y中必有一个是2(因为除2以外.其他质数均...