Day #199
Nerdle - Free online math equation puzzle game
What is Nerdle?
Nerdle is a daily math puzzle where you guess a hidden equation in 6 tries. Each guess must be a valid equation using digits (0-9), operators (+, -, *, /), and an equals sign. After you submit a guess, the tiles change color to show which characters are in the right position, which are in the equation but misplaced, and which aren't in the answer at all.
The original Nerdle was created by Richard Mann, a data scientist, with help from developer Marcus Tettmar. It launched in January 2022, right after Josh Wardle's Wordle (later acquired by The New York Times) went viral. Same concept, different domain: instead of guessing a five-letter word, you guess a complete equation like 48/6-2=6. The keyword "nerdle" pulls over 135,000 monthly searches in the US alone. 91GameStreet is an independent version - not affiliated with the original - with additional modes and bilingual support.
91GameStreet is a free version with 6 game modes, bilingual support (English and Spanish), and detailed statistics tracking. No account required. Your progress saves in your browser. New daily puzzles drop at midnight UTC.
How to play Nerdle
The rules take a minute to learn. The tricky part is the math.
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1. Look at the grid
Classic Nerdle gives you a grid with 6 rows and 8 columns. Each row is one guess. Each cell holds either a digit (0-9), an operator (+, -, *, /), or the equals sign (=). You fill one row per guess.
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2. Type a valid equation
Enter an equation that fills all 8 columns. Both sides of the equals sign must actually be equal. Something like 12+34=46 or 9*8-7=65. If the math doesn't check out, the game rejects it.
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3. Read the tile colors
After you submit, each tile turns a color. Green means that character is in the correct spot. Purple means the character appears in the hidden equation but you have it in the wrong position. Dark means that character isn't in the equation at all.
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4. Refine your next guess
Keep the green characters locked in place. Move purple characters to different positions. Don't reuse dark characters. Each guess should narrow down the possibilities. The on-screen keyboard also highlights which characters you've ruled out.
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5. Solve it within 6 guesses
You have exactly 6 attempts. Solve it in fewer guesses and your share score looks better. If you don't crack it by guess 6, the answer is revealed.
Quick tip: The equals sign always appears exactly once. In 8-column Classic, it's almost always in column 5, 6, or 7. Nailing its position early makes everything else easier.
Want the full visual walkthrough with examples? How to play Nerdle
Nerdle tips and strategy
A few habits that help once you know how the game works.
Locate the equals sign first
Every equation has exactly one = sign. In Classic (8 columns), it usually sits in column 5, 6, or 7. Your first guess should help you pin down where it goes. If your opener places = in column 6 and it turns green, you've just locked the structure of the equation.
Use a strong opening equation
A good opener tests several common digits and at least one operator. 12+34=46 checks six different digits, the + operator, and the = position. Some players prefer 9*8-7=65 to test multiplication early. Pick one and stick with it.
Eliminate operators early
There are four operators: +, -, *, /. If your first guess shows * and / as dark (absent), you know the answer only uses + and -. That cuts the search space dramatically. Two guesses should be enough to know which operators are in play.
Pay attention to misplaced digits
A digit showing purple on the left side of the equation probably belongs on the right side, or vice versa. Digits 0 through 5 appear in valid equations more often than 6 through 9, since they show up in more arithmetic combinations.
Think about mathematical constraints
Both sides of the equation must be equal. If the result (right side) is a single digit, the left side is heavily constrained. If you know the result is two digits, the left side needs operations that produce a two-digit number. This kind of reasoning eliminates more options than guessing randomly.
Nerdle game modes
Six ways to play, all free. Each mode changes the grid size, operators, or pacing.
Classic
The standard daily puzzle. 8 columns, all four operators. One new equation every day - everyone gets the same one. Streaks and stats are tracked.
Mini
A simpler daily puzzle with 6 columns and only + and - operators. Quicker to solve, same daily reset. Good for warming up.
Casual
Unlimited 6-column puzzles with + and -. Same rules as Mini but no daily limit. Play as many rounds as you want, back to back.
Pro
10-column equations with parentheses. The hardest mode. Equations like (3+4)*2=14 add another layer of complexity to your guessing.
Speed
Classic 8-column rules with a 90-second countdown. Solve as many puzzles as you can before time runs out. Personal bests are tracked.
Theme
8-column puzzles filtered by math topic: Algebra (multi-operator), Fractions (division-heavy), Percentages (proportion-style), or Finance (business math).
Nerdle vs other math puzzle games
There are several math-themed Wordle games out there. They each work differently.
Nerdle vs Mathler
In Mathler, you're given a target number and you guess only the left side of the equation. In Nerdle, you guess the full equation including the result. Mathler has fewer unknowns per guess; Nerdle requires you to figure out both sides simultaneously.
Nerdle vs Numberle
Numberle is digits only, no operators, no equals sign. You're guessing a sequence of numbers. Nerdle requires a complete, valid equation. The two games share the color-feedback mechanic but the solving logic is different.
Learn more about Nerdle
Two pages that go deeper than the summary above.
Frequently asked questions
What is Nerdle?
Nerdle is a math puzzle game where you guess a hidden equation in 6 tries. Each guess must be a valid equation using digits, operators (+, -, *, /), and an equals sign. Tiles change color after each guess to show which characters are correct, misplaced, or absent.
How do you play Nerdle?
Type a valid equation that fills the grid (e.g., 12+34=46 for 8 columns). Press Enter. Check the tile colors: green means correct position, purple means right character but wrong position, dark means not in the equation. Use the feedback to improve your next guess. You get 6 attempts.
How many guesses do you get in Nerdle?
6 guesses per puzzle, in every mode. If you don't solve it by guess 6, the hidden equation is revealed.
Is Nerdle free to play?
Yes. All 6 modes on 91GameStreet are free. No account, no sign-up, no payment. Your stats save locally in your browser.
What operators does Nerdle use?
Classic and Speed modes use all four: addition (+), subtraction (-), multiplication (*), and division (/). Mini and Casual only use + and -. Pro mode adds parentheses on top of all four operators.
What's the difference between Nerdle and Mathler?
In Nerdle, you guess the full equation, both sides of the equals sign. In Mathler, the target number is given and you guess only the expression that produces it. Different puzzle mechanics, different strategies.
What's the difference between Nerdle and Numberle?
Numberle uses only digits in a sequence. Nerdle requires a complete equation with operators and an equals sign. Nerdle involves arithmetic; Numberle is pure digit placement.
Can I play Nerdle unlimited (no daily limit)?
Yes. Casual mode gives you unlimited 6-column puzzles. Pro, Speed, and all Theme modes are also unlimited. Only Classic and Mini are once-per-day.
How many columns does Nerdle have?
Classic and Speed use 8 columns. Mini and Casual use 6 columns. Pro uses 10 columns. Theme modes use 8 columns. Each column holds one character (digit, operator, or equals sign).
Can I play Nerdle in Spanish?
Yes. 91GameStreet is fully available in English and Spanish. The interface, rules, and all content are translated. Use the language toggle in the header to switch.
Is Nerdle the same as Math Wordle?
"Math Wordle" is an informal name people use for math-themed Wordle games. Nerdle is the most popular one. The gameplay is the same concept as Wordle (guess + color feedback) but applied to math equations instead of words.
Where can I find today's Nerdle answer?
91GameStreet's daily Classic and Mini puzzles reset at midnight UTC. If you can't solve one, the answer is revealed after your 6th guess. We don't publish spoilers, but you can use the strategy guide to improve your approach.
Can I play Nerdle for free in Spanish?
Yes. 91GameStreet is free and fully available in Spanish. The interface, instructions, and all page content are translated. No hidden payments or premium features. Use the language toggle at the top to switch between English and Spanish.
Do I need to download an app to play?
No. 91GameStreet runs in your browser on any device. Nothing to install. Open 91gamestreet.com/nerdle and start playing.
What game modes does Nerdle have?
Six: Classic (8 columns, daily puzzle), Mini (6 columns, daily), Casual (6 columns, unlimited), Pro (10 columns with parentheses), Speed (90-second countdown), and Theme (algebra, fractions, percentages, or finance). The last four are unlimited.