1至300中分别被3,4,5除余1的数有几个?
问题描述：
1至300中分别被3,4,5除余1的数有几个?
答
(300-1)/(3X4X5)=4余59
故只有有5个,分别为3x4x5x0+13x4x5x1+1,3x4x5x2+1,3x4x5x3+1,3x4x5x4+1
即1,61,121,181,241