How do you play the digit symbol substitution test?

Find the shown digit in the fixed code table, then choose its matching symbol from the six answer buttons.

Do the answer buttons move?

Yes. Symbol positions are shuffled every round, while the digit-to-symbol code table stays fixed.

Which keyboard keys can I use?

Keys 1 through 6 choose the current answer-button positions from left to right. Each button visibly displays its current key.

Is this a clinical digit symbol test?

No. This is a recreational browser game and not a diagnostic cognitive assessment.

CODE LOOKUP · 30 ROUNDS

DIGIT SYMBOL SUBSTITUTION

Use the fixed code key to convert each digit into the correct symbol.

ROUNDS0 / 30

Play 30 balanced rounds—five appearances of every digit. Mistakes count, then play continues.

CORRECT0

ACCURACY—

AVG. MATCH—

FASTEST—

FIXED REFERENCE

DIGIT → SYMBOL CODE KEY

1◆

2●

3▲

4✦

5■

6⬟

READY?

READ THE DIGIT. FIND ITS SYMBOL.

The code key stays fixed, but answer-button positions shuffle every round.

MATCH THIS DIGIT?

Keyboard: keys 1–6 choose the currently displayed button positions from left to right. Touch or mouse: tap a symbol button.

HOW TO PLAY

Translate each digit with the fixed code key

01
Read the large digit and find the same digit in the reference table at the top.
02
Identify its paired symbol, then locate that symbol among the shuffled answer buttons.
03
Tap it or press the button-position key shown on it before the timing bar empties.

CODE MATCHING

Why shuffle the answer positions?

The digit-to-symbol code never changes, but button positions do. This keeps the task focused on finding the correct symbol instead of copying the digit directly to the same number key.

Standard mode presents every digit exactly five times, so each code-key pair contributes equally to the result.

ENTERTAINMENT CHALLENGE

Not a diagnostic substitution test

This browser game is for entertainment and personal practice. It is not a validated Digit Symbol Substitution Test or a clinical measure of processing speed.

Practice, display size, symbol familiarity, device latency, and input method can all change a result.

QUESTIONS

Digit symbol substitution FAQ

Does the code key ever change?

No. Digits 1–6 always map to the same six symbols during the game.

Why do the symbol buttons move?

Their positions shuffle each round so you must find the encoded symbol instead of pressing the prompt digit automatically.

How do keyboard controls work?

Keys 1–6 choose answer positions from left to right. Read the small key label displayed on each symbol button.

Is this a clinical test?

No. It is a recreational code-matching game, not a medical or diagnostic assessment.