Logic 1 minute1 min Free, no account Daily challenge

Logic Sequences — logic test

Five number sequences with a hidden rule: add, subtract or multiply. Find the last number from four choices, with no time limit.

  • 5sequences to complete
  • ∞no timer
  • 4answer choices
  • 0accounts needed

How the demo goes

One sequence, one rule, one number.

  1. 1

    Study the sequence

    Four numbers follow a rule: +N, −N, ×2 or ×3. The missing number is always the last one.

  2. 2

    Pick the number

    Four possible answers, no time limit. Keys 1 to 4 on your keyboard.

  3. 3

    See the right answer

    Wrong pick? The correct number shows up briefly. Your score is the number of sequences solved.

Score guide

How to read your score.

The number of sequences solved out of five. Each try makes the most common rules more familiar.

  • 0–1 Try again The rules get easier to spot with a little practice.
  • 2–3 Good logic The classic sequences are cracked.
  • 4 Rock solid Only one sequence got away.
  • 5 Flawless Every rule cracked.

This is just a taste

In the app, the games go much further.

Play every game in the app
  • Difficulty that adapts to your level
  • Combos, boosters and records
  • Stats and records saved
  • Streaks, badges and leaderboards

The 8 other demos

See the catalog