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howmanyofthepositiveintegerslessthan25are2lessthananintegermultipleof求高手给思路,实在是不明白具体方法,除了挨个数字算以外,还有什么其他方法吗?
题目详情
how many of the positive integers less than 25 are 2 less than an integer multiple of
求高手给思路,实在是不明白具体方法,除了挨个数字算以外,还有什么其他方法吗?
求高手给思路,实在是不明白具体方法,除了挨个数字算以外,还有什么其他方法吗?
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答案和解析
Answer:
The following numbers are integer multiples of 4:
4, 8, 12, 16, 20, 24, 28,
and the numbers 2 less than those numbers are
2, 6, 10, 14, 18, 22, 26.
But only the first six are less than 25. So the answer is 6.
The following numbers are integer multiples of 4:
4, 8, 12, 16, 20, 24, 28,
and the numbers 2 less than those numbers are
2, 6, 10, 14, 18, 22, 26.
But only the first six are less than 25. So the answer is 6.
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