The cycle of going to the gym is 2+3=5 days, 4×5=20 days, and 20 days is a big cycle. Fixed is 2×3=6 days, and the rest 1 1 day has 5 days to go together (May 3 1 day, Liu Pingjun Jr. went to 3 1× 3/). Xiao Liu walks for 24 days at most and 23 days at least, and Xiao Zhang walks for 13 days at most and 12 days at least);
According to the figure, we can get:
There are five days together from 1 to 1 1 or five days together from 17 to 20 to 7.
So, from May 1, will both of them go on the first day?
May 1, Xiao Liu went on the first day and Xiao Zhang went on the second day; According to the first method, 1, 2, 6, 7, 1 1 7, 2 1, 22, 26, 27, 3 1, according to the second method, 60.