Independent guide
This independent RK 89 guide supplies its own free Common Factor Roulette demo. Operator identity, domains, licence, apps, payments, support and commercial game equivalence have not been independently verified. No operator account or commercial link is supplied here.
External claims remain unverified
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Expected return and variance
Exact expected return is 96% in every band: hit probability multiplied by the total-return multiplier is 0.96. Bands change hit frequency and variance, not expectation. A 96% expectation is not a promise of a single spin or a short session. This demo does not certify an external operator or reproduce its games.
Frequently asked questions
Is this an operator site?
This independent RK 89 guide supplies its own free Common Factor Roulette demo. Operator identity, domains, licence, apps, payments, support and commercial game equivalence have not been independently verified. No operator account or commercial link is supplied here.
How is the score calculated?
One paid round draws two independent uniform pockets numbered 0–12. Score is their greatest common divisor, with gcd(0,0)=0. Choose score band 0–4, 5–8 or 9–12 before spinning. All 169 ordered pairs are equally likely.
How are bands priced?
There are 141 winning ordered pairs for scores 0–4, 16 for 5–8 and 12 for 9–12. For example, draws 6 and 9 have gcd 3, draws 0 and 8 score 8, and draws 0 and 0 score 0. Multipliers use these exact counts, not the number of score labels.
Explore the original free Common Factor game and its score bands.
