math

1.5    1-4, 13，17，21，25，29，33，，37，41，45，49，53，57，61, 75

1.6    1, 5,9,13,17,21,25,29,33,43, 51

2.1   17,21,25,29,33,37,41,45

2.2   1, 5,9,13,17,21,25,29,33,37,41,45,49,53,57,61,65,75,79

Need process with hand writing