Roulette Number Strategy
Roulette number strategies bet on single numbers or small number groups. Includes single-number flat bets, multi-number coverage and number-pattern systems.
Types of number strategies
Single number flat: bet one straight-up number every spin. Highest variance, 35:1 payout. See Single Number Roulette Strategy.
Multi-number coverage: bet 3-6 specific straights. Lower per-bet variance but higher total stake per spin.
Number group patterns: bet on adjacent wheel sectors (neighbours, Voisins du Zero) or layout patterns (corners, splits).
Lucky number systems: betting birthdays, ages, etc. No different mathematically from any other set of straights.
Hit frequency vs payout
Each number bet pays 35:1 with 2.70% hit on European. Covering N numbers raises hit rate to N × 2.70% but each win only pays 35:1 on the winning bet - the other N−1 stakes are lost.
Net per hit = 35 − (N−1) units. Net per miss = −N units. Expected value = (N/37) × (35 − N + 1) + ((37−N)/37) × −N. Always resolves to −2.70% of total stake.
Variance
A single-number bet has the highest variance of any roulette bet. Covering multiple numbers reduces variance proportionally but never below the variance floor of outside bets.
If you want big swings, fewer numbers. If you want bankroll smoothing, more numbers.
Examples
Three straight bets on 7, 14, 22: hit rate 8.11%, equivalent to a street bet but on non-adjacent numbers. EV identical to a single street: −2.70% of total stake.
Seven straights covering 'lucky 7' (7, 17, 27, etc.): hit rate ~18.9%. Net per hit = 29 units. Net per miss = −7 units. Same EV percentage.