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请教 數学題 !
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请教 數学題 !
題目 :
8個質數的和為 100,
是哪 8個質數 ?
各位大大你好, 請幫忙 谢谢 ! |
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发表于 20-10-2009 09:53 AM
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字数还是质数?有分别的吗?
我ASSUME是字数
我觉得可能性太多了
no 1, 100
no 2, 100
no 3, 100
no 4, 100
no 5, 100
no 6, 100
no 7, 100
no 8, 100
i think the answer is maybe
50, 75, 90, 95, 105, 110, 125, 150 |
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发表于 20-10-2009 11:22 AM
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回复 2# espano 的帖子
质数=prime number =nombor perdana.
质数是个独特的数字除了数字1,这质数字只可 被整除以1 和 可被整除它自己却不能被其它被除数整除:
Example:
2/1=2 and 2/2 = 1 . Therefore, 2 is a prime number.
3/1=3 and 3/3 = 1 . Therefore, 3 is a prime number.
4/1=4 and 4/4 = 1 but 4/2=2 . Therefore, 4 is not a prime number.
5/1=5 and 5/5 = 1 . Therefore, 5 is a prime number.
6/1=6 and 6/6 = 1 but 6/2=3 . Therefore, 6 is not a prime number.
7/1=7 and 7/7 = 1 . Therefore, 7 is a prime number.
....
Hence, the prime numbers are 2,3,5,7,11,13,17,19,...
8個質數的和為 100.
Find the sum of 8 prime numbers which is 100. |
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发表于 20-10-2009 05:30 PM
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发表于 13-11-2009 06:43 PM
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8個質數的和為 100,
是哪 8個質數 ?
这个问题是问8个相同的号码加起来等于100.
100/8=12.5
是酱解释吗?
[ 本帖最后由 elvinng87 于 13-11-2009 06:45 PM 编辑 ] |
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发表于 19-11-2009 05:19 PM
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In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. The first twenty-six prime numbers are:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101.
若要得到总和100,从以上的数字中选八个相加。可是没有列明是否可以重叠同一个数字。 |
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