How Odd One Out Builds a Round

Each round builds four numbers from one of four pattern kinds in the engine. Three obey the rule; one does not.

Play Odd One Out free in your browser — no signup, no download. This guide describes the BitzGaming board only.

How Odd One Out works on BitzGaming

• Kind 0: three even numbers (2–9)×2; the odd one is odd.
• Kind 1: three multiples of 5; the outsider is chosen not to be a multiple of 5.
• Kind 2: three “round tens”; the outsider is not a multiple of 10.
• Kind 3: three teens (11–19); the outsider is 21–40.
• Values are shuffled. If a collision would make fewer than four distinct numbers, the engine regenerates.
• Scoring and the 15-second clock follow the same family as the other micro games (correct adds, streak tracked).

How to play Odd One Out

• Open Odd One Out. Start 15 seconds.
• Look for even/odd, last digit 0 or 5, or the teen range.
• Tap the outsider. Keys 1–4 work.

Strategy for this board

• Check parity first — it is the cheapest filter.
• Then last digits (0 or 5).
• If three numbers sit in the teens, the outsider is the one outside 11–19.

Personal best

Best score, correct count, and streak are stored locally.

Play something else

Raw sums: Play Quick Maths. Pairs: Play Memory. Easy brain set: maths games.

Questions about Odd One Out

Is the hint shown before I answer?

The hint names the rule for feedback. Play as if you must find it yourself.