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Anonymous users2024-02-07<> even numbers within 100.
An even number is an integer that is divisible by 2. Positive even numbers are also called even numbers. If a number is a multiple of 2, it is an even number and can be expressed as 2n; If not, it is an odd number, which can be expressed as 2n+1 (n is an integer), that is, the remainder of the odd number divided by two is one.
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Anonymous users2024-02-061. Odd numbers from 1 to 100 (in integers, numbers that are not divisible by 2 are called odd numbers):
2. Even numbers from 1 to 100 (even numbers are integers divisible by 2):
Dry feast rise. 3. Prime numbers from 1 to 100 (prime numbers are also known as prime numbers. An integer is a number in a natural number greater than 1 that is not divisible by any natural number other than 1 and the integer itself. ）：
4. The composite number of 1-100 (the composite number refers to the number of natural numbers that can be divisible by other numbers (except 0) in addition to 1 and itself. ）：
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Anonymous users2024-02-05All odd numbers up to 100:
All even numbers within 100 are:
0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,Manuscript Bichang 40,42,44,46,,,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100.
Extended Information: Even though the whole prime number is infinite, some people still ask "how many prime numbers are under 100,000?" Huishan", "How likely is a random 100-digit number to be prime?" ”。The prime number theorem can solve this problem.
1. There must be at least one prime number between a number greater than 1 and its 2 times (i.e., in the interval (key a, 2a).
2. There is a series of difference numbers of prime numbers of any length.
3. An even number can be written as the sum of two composite numbers, each of which has a maximum of 9 prime factors. (Norwegian mathematician Brown, 1920).
4. An even number must be written as a prime number plus a composite number, where the number of factors of the composite number has an upper bound. (Rainey, 1948).
5. An even number must be written as a prime number plus a composite number consisting of up to 5 factors. Later, some people referred to this result as (1 + 5) (Pan Chengdong, China, 1968).
6. A sufficiently large even number must be written as a prime number plus a composite number composed of up to 2 prime factors. Abbreviated as (1 + 2).
Encyclopedia - odd
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