Cheater's Dice Set - Blue: - Rules of Play says:
4 Cheat Dice:
d20 with numbers: 20 & 2-20 (no 1)
d10 with numbers: 10 & 2-10 (no 1)
d6 with numbers: 1 & 1-5 (no 6)
d6 with numbers: 6 & 2-6 (no 1) 3
Normal Dice:
d20 with numbers: 1-20
d10 with numbers: 12-10
d6 with numbers: 1-6