Brainy Digits: a number sequence puzzle game
Brainy Digits is a number sequence puzzle game where one number in a row of seven is hidden behind a question mark. Find the rule that links the others, then choose the missing number from six options. You have up to a minute per puzzle, which is plenty once you spot the pattern.
Play nowFree · No download · Runs in your browser
How to play
- Look at the row of seven numbers and find the gap marked with ?.
- Work out the rule: a steady step, a repeating cycle, a list of squares or two alternating steps.
- Check your rule against every number in the row, not just the neighbors of the gap.
- Tap the missing number among the six options before the timer runs out.
What it exercises
Each puzzle is a small piece of detective work with numbers.
Pattern recognition
Sequences hide different kinds of rules. Spotting quickly whether numbers climb, repeat or zigzag is the first step.
Mental arithmetic
Differences of 4, 9 or 12 have to be worked out in your head, and squares like 49, 64 and 81 have to be recognized on sight.
Checking your reasoning
A rule that fits two numbers might not fit all seven. Testing it against the whole row before answering is a good habit.
Tips
- Start by writing down, in your head, the difference between each pair of neighbors. Steady differences give the answer at once.
- If the differences are not steady, check whether they alternate, for example +7 then -2.
- Look for repeats. Rows like 24, 21, 12, 24, ?, 12, 24 are cycles, and the missing value is a copy of an earlier one.
- Big jumps that keep growing often mean squares: 36, 49, ?, 81.
- If the gap is at the start, work backwards from the second number.
Frequently asked questions
How do you solve a number sequence puzzle?
Find the rule that turns each number into the next. Look at differences first, then at repeating groups, alternating steps and well-known series such as square numbers. Once one rule fits every number in the row, apply it to the gap.
What kinds of patterns appear in Brainy Digits?
Steady steps such as 3, 12, 21, 30, repeating cycles like 1, 2, 3, 1, 2, 3, squares like 36, 49, 64, and sequences that alternate two different steps.
Is there a missing number puzzle for adults online?
Brainy Digits is one. It is free with no ads, runs in your browser, and you play with a free Cleverini account so the game can track your level.
Can I play number sequence puzzles against another person?
Yes. Next to single player there is a multiplayer mode that matches you with another player for the same series of puzzles.
How long do I have for each number pattern?
Up to 60 seconds per sequence. If one has you stuck, you can skip to the next question.
Ready for a round?
It opens in your browser. A free Cleverini account keeps your level and lets you play with friends.
Play nowMore games you might like
Math MatrixCrack the rule that links the corner numbers to the center, then find the missing one
PyramidSpot the number pattern running through the pyramid and fill the gap
Number DropDrop numbered blocks, merge equal pairs and chain them into big values
Sum BlocksDrop number pieces so every row and column hits its target sum
Logic ChallengeNumber sequences, brick pyramids and shape rules: find the missing number
SudokuThe classic 9x9 number grid, solo or turn by turn against another player