1) Low Serial Number (細號)
Examples: 00000001, 00000012
2) Big Serial Number (大號)
Examples: 10000000, 90000000
3) Binary
Examples: 01110111, 45554445
4) Solid and Near Solid
Examples: 11111111, 44444444, 88888888
5) Radar (雷達)
Examples: 56744765, 23511532
6) Repeater
Examples: 56565656, 19191919
7) Doubles
Examples: 11889977, 66991133
8) Ladder (蛇)
Examples: 12345678 (順蛇)
Examples: 98765432 (倒蛇)
Examples: 14567328, 95827364 (亂蛇)
9) Consecutive (連號)
Examples: 16548963 and 16548964
10) Bookends
Examples: 12387123, 36841368
11) Special Dates
Examples: 07011980, 09022010