Nerdle Free Online | Math Wordle Rules & Daily Tips

Nerdle is a daily math puzzle game built on the same core mechanic as Wordle, but instead of guessing a word, you guess an equation. You get 6 attempts to find an 8-character math equation that evaluates correctly. Each guess gives you color-coded clues about which numbers and operators are in the right position.

Play Nerdle free at PlayBrain, daily puzzle + unlimited practice mode. No download required.

How Nerdle Works

The answer is always a valid math equation with exactly 8 characters, using digits (0–9), operators (+, -, *, /), and an equals sign (=). Your job: figure out which equation it is in 6 guesses or fewer.

After each guess, tiles change color:

The logic is identical to Wordle, just applied to math equations instead of letters. A guess like 10+20=30 is valid if it's a correct equation. If "3" lights up green in position 7, you know the 7th character is "3".

Nerdle Rules You Need to Know

• Every guess must be a valid equation. 1+2=4 is invalid (1+2≠4). The game won't accept it.
• The equals sign is always at position 6, 7, or 8. Structure accordingly.
• Order of operations applies. 2+3*4=14 is valid (multiplication first: 3*4=12, plus 2=14).
• No leading zeros. 02+3=5 is not allowed. Numbers don't pad with zeros.
• Commutative answers aren't both valid. If the answer is 10+20=30, the game won't also accept 20+10=30 unless commutative mode is enabled.

Starting Strategy: The Best Opening Guess

A strong opening Nerdle guess contains common digits and operators while covering as much information as possible. Think about frequency:

• Common digits: 1, 2, 3, 4 appear more often in valid 8-character equations than larger numbers
• Common operators: + and - are more frequent than * and /
• Include the = sign: Every valid equation has one, so its position is free information

A high-information first guess is something like 12+34=46 or 10*3+2=32, these cover 4+ unique digits and at least one operator. You're not trying to get lucky on the first guess; you're narrowing down the character set efficiently.

Reading the Clues

After each guess, use the colors methodically:

Green tiles

Lock that character in that position for all future guesses. If position 3 is green with "+", every future guess must have "+" at position 3.

Purple tiles

The character exists somewhere in the equation, but not in this position. Rearrange it in your next guess, don't leave it in the same spot.

Black tiles

Eliminate that character entirely. If "7" is black, the answer contains no 7s. This is equally valuable to green, you're shrinking the possibility space.

How to Solve Nerdle in 3 Guesses

The fastest solves follow this pattern:

1. Guess 1: Maximum information, hit as many unique digits and operators as possible. Accept that you won't solve it yet.
2. Guess 2: Use all clues from guess 1. Fix green positions. Move purple characters to new positions. Avoid all black characters.
3. Guess 3: By now you have enough constraints to construct the specific equation. Focus on valid equations that satisfy all known constraints.

The key skill in Nerdle that differs from Wordle: you must always guess valid equations. This means your clue-narrowing moves are constrained by math, you can't just place characters freely. Learn to think in equation structures, not just character positions.

Nerdle Variants

The standard Nerdle is an 8-character equation. There are also mini-mode and maxi-mode variants in some versions:

• Mini Nerdle: 6-character equations, faster and easier (e.g. 4+5=9)
• Classic Nerdle: Standard 8 characters (e.g. 12+34=46)
• Speed Nerdle: Race against the clock instead of guesses

The daily puzzle at PlayBrain uses classic 8-character equations, one per day, with a fresh puzzle at midnight.

Common Nerdle Mistakes

• Guessing invalid equations. Always double-check your math before submitting. Invalid guesses waste a turn.
• Ignoring order of operations. 2+3*4 equals 14, not 20. Mental math errors lead to invalid guesses.
• Repeating eliminated characters. Black means gone. Don't include black characters in later guesses, it wastes information.
• Not exploring the operator space. If your guesses have only used +, try - or * to learn whether the answer equation uses those operators.
• Too narrow on the right side. The number after = can be large (like 99). Don't assume single-digit results.

Nerdle vs. Other Math and Word Puzzle Games

Nerdle is uniquely math-first. If you like Wordle's daily ritual but want a more analytical challenge, Nerdle is the natural next step.

Play Nerdle Free, Daily Math Puzzle

Play Nerdle free online here, one new daily puzzle at midnight, plus unlimited practice rounds. For more daily word puzzles, try Word Guess (Wordle-style), Connections (grouping challenge), or Dordle (two words at once). If you want more math-based challenges, Number Crunch tests Countdown-style arithmetic against a timer. All free at PlayBrain.