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?

Question

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?

Answer 1

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.