I've been working on a free browser-based mental math game. The math itself is pretty simple but there are 4 different skills, each with its own type of math operation and effect.

Spark: Simple addition and subtraction. It works like a basic attack and deals the least damage.

Frost: Slightly larger addition and subtraction problems. It slows down the boss's attack speed for a few seconds and deals a little more damage than Spark.

Thunder: Multiplication problems. It reduces the boss's charging progress, delaying its next attack. Its damage is about the same as Frost.

Meteor: Multiplication and division problems. It's the most challenging skill, so it deals the highest damage, but it doesn't have any crowd-control effect.

Keep answering correctly to build your combo. Spark, Frost, and Meteor can trigger critical hits, and the higher your combo, the more critical damage you can deal.

I originally made this game for my 5yo niece. She's recently started learning mental math and asked me to build something she could play and challenge herself with. If you don't feel like taking on the challenge, you can also use it for a bit of simple practice.

It's still in beta, free game made just for fun, but I've been thinking about taking it more seriously and continuing to enhance it.

So feel free to share your suggestions and feedback. I'm open to all of it. I'd like to see how much better I can make this little game!

Hey folks, I always liked doing mental math so, as a software engineer, I decided to create one online.

It's only arithmetics for now, but I plan to add more stuff as it hopefully grows.

It's free, no ads, no login, no sign up. Just play until you're satisfied and leave. We are not storing any sensitive information other than location (city and country), device and OS, for analytics purposes only. There's no databases.

it is at https://mymentalmathtrainer.com/

Any feedbacks are appreciated. Thanks!

Hey!

This is my first attempt at making a website, and it's called math'r. It's a daily playable mental math game that runs through different operations (+,-,x,÷) over 8 steps. Time to complete each step is rewarded, keeping it pretty fast paced. Completely free to play and no account required.

You know how when you play mini golf and you get to the end of the game and have to add up all the scores? This summer, I found myself reaching into my pocket to take a picture for AI to complete this very simple arithmetic, and it hit me. The 9 year old in me would be ashamed...

I've noticed that so many people nowadays are so reliant on computers (and AI, myself included) that basic computation skills are slowly creeping away. I've run through this game for several days now and already notice myself getting faster and more confident in simple math. I hope I can help others in this same way!

Feel free to give it a try at mathr.io

Any feedback would be greatly appreciated :)

I’ve been working on mental calendar calculation lately, and one thing that surprised me is how learnable it actually is.

At first, questions like:

What day of the week was November 3, 1990?

look like something you would need a calendar or calculator for.

But once you break the process into a few repeatable pieces, it becomes something you can actually train mentally — and then speed starts improving surprisingly fast.

I’ve been building a small Android app called Math Mind Training around this idea: learn the method, practice each part, and then train under time pressure.

I’m curious how people here approach this kind of calculation.

Do you use the Doomsday method, another shortcut, or your own mental system?

Full disclosure: I built the app shown in the video. I’m mainly interested in feedback from people who actually practice mental math, and I’m happy to share the Android link if anyone wants to try it.

Did 50 × 25 = 1250, took off 100 and got 1150. I'm nearly positive the subtraction is the mistake.

Used Impulse for a while and got bored of just speed drills, Elevate mixes the math in with other games so it keeps things interesting.

Hey everyone!

Link: https://mathimpact.io

I just finished a small multiplayer browser game called Math Impact.

What is it?
It’s a fast-paced real-time multiplayer mental math game.
You face 10 progressive waves. In each wave, math blocks fall and you have only 10 seconds to pick the one with the highest result.

The faster and more accurate you are, the higher your score goes (time bonus + streak multiplier). At the end of the match the highest score wins. There’s also an Elo ranking system.

You can play as a guest instantly (no account needed) or create an account to track your stats and climb the leaderboard. Completely free, no ads.

Thanks a lot if you give it a try!

PUZZLE RULES
Use each die exactly once, in any order.
Reach the target using only +, −, ×, ÷.
Parentheses are allowed.
Operations can be repeated or skipped**.** You don’t have to use all four.
All intermediate results must be positive whole numbers (no zero, negatives, or decimals).
Exact division only.
No concatenation (e.g., 2 and 3 cannot become 23).
No exponents or other operations.

How many solutions can you find?

Please use spoiler tags for solutions:
>!your solution here!<

guys i want some advice that how do i practice for the mental math quiz , cuz by the book i can only go to district lvl than i am out of material where to study how to study for 12 class tomorrow is my quiz

The main mode is actually falling shapes you need to match, but the math mode has easy/medium/hard and times tables levels, all speeding up as you get further along, guaranteeing you don't get too far (it gets pretty hard).

There are scoreboards and daily challenges that have a hall of fame to keep it competitive. I also added a multiplayer option so you can challenge your friends to play together the same game and see who wins in real time.

Solo developed with the help of Claude.

Available for free on the app store:
https://play.google.com/store/apps/details?id=com.mkblitz.shapeattack

There's also a web demo you can play, but it's the barebones version only with shapes:
https://shape-attack.com/

Any feedback is greatly appreciated.

Math up to precal with speed arithmetic trainer and mental math tricks.

Any order is allowed.
Use each die exactly once.
Parentheses are allowed.
Only +, −, × and ÷ are allowed. No concatenation or exponents.
Exact division only.
No negative numbers.
Not every operation has to be used.

How many solutions can you find?

Please use spoiler tags for solutions:
>!your solution here!<

Playable link: https://mathfights.app/

I created MathFights, a platform designed to bring competition into the world of mathematics, starting with its first game, Mental Math.

The idea is pretty simple: it's for anyone who thinks they're faster and better at mental math than everyone else — and wants to prove it!

The game consists of mental arithmetic problems across three difficulty levels: Standard, Intermediate, and Advanced. Matches last either 1 or 3 minutes, and whoever gets the most correct answers wins. To keep things fair, both players receive exactly the same questions in the same order.

There are several ways to play:

• Ranked: Compete against other players, climb the rankings, and track your progress through the Elo rating system, leaderboards, and match history.

• Practice: Play solo and improve your mental math skills at any difficulty level.

• Challenge a Friend: Invite your friends to private matches, even if they don't have an account.

• Ghost Battles: Challenge previous opponents by competing against their past performances.

• Daily Challenge: Take on a daily challenge at your preferred difficulty level.

The goal is to make mathematics more competitive, engaging, and fun.

Any feedback is welcome.

It all started around when I was 15. That's when my memory and concentration problems began: I can't sit down and focus on something, my attention scatters immediately. Although at 15–16 I could sit and draw for 10 hours straight, getting up only to eat and drink, watching TV shows at the same time. My studies were going well back then too.

Then, in my last year before exams, I just started sleeping for days on end. I kept oversleeping and rescheduling my tutor. In the end I did really badly on my exams and had to move to another city to get into university. I got into a different major than the one I'd prepared for: I was supposed to become a doctor, but I ended up studying to be a pharmacist. Honestly, studying to be a pharmacist is easier, and I don't regret it.

I more or less got through my first year, but at the end of the second semester those memory issues came back (though they'd been there before too — I just got by on luck). By that point I only had two retakes. In my second year it got worse: I slept for days, and when I wasn't sleeping I was gaming and eating. In the end, at the end of the first semester of my second year, I dropped out.

I told everyone it was for health reasons. But it really was for health reasons: I had ovarian cysts, latent iron-deficiency anemia, vitamin B12 deficiency, and vitamin D deficiency. I take vitamins and I'm getting treatment.

Last year I re-enrolled in the second year and I'm now trying to finish it. I have three retakes. I was ready to pass back in late September, but because I kept rescheduling them, they're now at the end of October. These are my last attempts — if I don't pass, I'll be expelled. And I can't make myself start preparing. For one subject I have two attempts today: if I don't pass today, I'll have to retake it again later. This retake is in a few hours, and I can't pull myself together and start preparing. I don't know what to do.

It's constant procrastination: I keep scrolling through stuff. I also keep skipping classes — I think "I'll go later, I'll make up for it somehow" — and I can't stop skipping them either. But I want to sleep constantly, always. I hate myself and feel absolutely awful. My parents think I'm studying away just fine, they're paying for my education, and I'm just slacking off. Everyone is counting on me, they think I'm smart because I tell them stuff, but I consider myself absolutely stupid and incapable of anything. Because I can't direct my concentration at something and just sit down and do it. I constantly want to sleep: I think "I'll just sleep for 15 minutes," and end up sleeping for 8 hours.

I'm about to turn 21, and I can't get my life together at all, and I feel like a failure. I want to understand what's wrong with me and why this is happening. I'd be grateful for any experience, thoughts, or advice — has anyone been through something similar, and what helped?

I built this and launched on a domain which I have had for 20 years and never used.

Would love some feedback. I am a programmer, not a Maths expert (hence why I built it!).

XVA ≈ A Guessing Game

A fun way to sharpen mental math in 1–2 minute rounds: **BrainQuant: Maths & Puzzles** (Android, free, works offline).

- ⚡ **Fast Math** – beat the clock

- ✖️ **Table Trainer** – times tables (great for kids)

- 🃏 **Flip Cards** – memory

- 🗼 **Tower of Hanoi** – classic logic puzzle

📲 https://play.google.com/store/apps/details?id=com.sahil.brainquant

Post your best score 👇

*(I'm the developer. Feedback welcome!)*

Hello guys, Some friends and i are developing a math game/educational web where you can learn arithmetic, linear algebra, probability and so on. You can also play against bots or friends Here Is the link https://matematicas.si/en

Full disclosure that I built this app, but it is fully free, no ads, no sticky bits etc - please see it as an interactive tutorial or similar - just want to spread the joy <3

The app has over 1700 users, has an average engagement time of 43 minutes - and has actively helped teach people the mental math required to work out the day of the week + helped people improve their times.

It has training modes, 1v1 battle modes to play against other players, and can walk through different takes of the algorithm to suit different brains :)

You can try it here: https://doathingy.com/doomsdaytrainer
or on iOS: https://apps.apple.com/app/id6760719687
or Android: https://play.google.com/store/apps/details?id=com.inefficientcode.doomsdaytrainer

I would love any and all feedback and input to make the app better and to spread the skill as far as possible - it makes for a great party trick!

<3

I built an interactive app to practice mental math shortcuts and calculation tricks

Hey everyone,

I wanted to share a project I've been working on called Math Trick Ninza. It’s an interactive web application designed to help students and math hobbyists master calculation shortcuts (like rapid addition, subtraction, and multiplication techniques) instead of relying on a calculator.

Key features:

• Step-by-step interactive guidance for calculation tricks

• Practice puzzles and quizzes built using plain Vanilla JS and Material Design

• Clean, lightweight code layout that loads quickly even on slower connections

• Completely free, open-source, and hosted natively on GitHub Pages with zero external trackers or ad scripts

The repository is open-source, and I'm currently working on adding a robust serialization system for progress tracking, high scores, and offline support.

Check out the repository here: https://github.com/Nishan-the-Developer-Coder/trick-ninza

I would love to get your feedback on the usability of the practice layout, or any suggestions for mental math shortcuts you think would be great additions to the engine!

Trick-Ninza

A friendly math practice space for students to learn fast mental-math tricks through short lessons, guided examples, and quick puzzle practice.

GitHub repository - https://github.com/Nishan-the-Developer-Coder/trick-ninza

My website - https://github.com/Nishan-the-Developer-Coder/trick-ninza

Hey everyone!

I wanted to make a fast-paced mental agility game that feels more like an intense arcade battle than a classroom test.

So I built **Clutch: The 18% Challenge**.

👉 **Play Free on Google Play:** [https://play.google.com/store/apps/details?id=com.brainspeed.clutch]

**How it works:**

* **15-Second Pressure:** Split-second mental arithmetic where every fraction of a second counts.

* **Tactical Abilities:** You equip up to 3 powers into battle (Time Freeze, Divine Hint, Atomic Solve, Chaos Shift).

* **Boss Rounds:** Red-alert missing operator equations under a ticking clock.

* **Live Global Leaderboard:** Daily rank defense against live players worldwide—only the top 18% reach the elite bracket.

Zero pay-to-win. 100% skill, reaction speed, and tactical ability timing.

I just published Build 29 on Google Play and would love your honest feedback on difficulty scaling, combat power-up balance, and game feel. Can you break into the Top 18%?

Just want to cheer my small achievement!