Divide the natural numbers 5 ~ 300 into three groups ABC a) 5 10 11 16 17 22.. b) 6 9 12 15 18 21.. C) 7 8 13 14 19 20.. ask how many numbers each group has Divide natural numbers 5 ~ 300 into three groups ABC a) 5 10 11 16 17 22.. b) 6 9 12 15 18 21.. C) 7 8 13 14 19 20.. how many numbers are there in each group?

Divide the natural numbers 5 ~ 300 into three groups ABC a) 5 10 11 16 17 22.. b) 6 9 12 15 18 21.. C) 7 8 13 14 19 20.. ask how many numbers each group has Divide natural numbers 5 ~ 300 into three groups ABC a) 5 10 11 16 17 22.. b) 6 9 12 15 18 21.. C) 7 8 13 14 19 20.. how many numbers are there in each group?

a. 5,10,11,16,17,22,23,28,29,34,35,40, + 1, + 5
b、6,9 , 12,15,18,21,24,27,30,33,36,39.an=3*（n+1）
c. 7,8,13,14,19,20,25,26,31,32,37,38 + 1, + 5
The order of a, B, C is 5,6,7,8,9,10,11,12,13.300
(the order can be strictly proved, but it can be obtained by observation)
5-300 has 296 data, 296 / 3 = 98. Remainder 2. So there are 99 data in group A, 99 data in group B and 98 data in group C