Train your mental math speed daily
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Train your mental math speed daily
Practice5 questions · No timer · Quick warmup
10 questions · 15s per question · Train speed
10 questions · 3 min total · Exam pressure
10 questions · Choose a category
Multi-topic session · 1–100 questions · Fully personalized
Practice your previously wrong answers
AI-generated word problems · Choose category & difficulty
Difficulty is auto-managed based on your performance.
LearnCalculation foundations every student must memorize.
| Fraction | Percentage |
|---|---|
| 1/2 | 50% |
| 1/3 | 33.33% |
| 2/3 | 66.66% |
| 1/4 | 25% |
| 3/4 | 75% |
| 1/5 | 20% |
| 2/5 | 40% |
| 3/5 | 60% |
| 4/5 | 80% |
| 1/6 | 16.66% |
| 5/6 | 83.33% |
| 1/8 | 12.5% |
| 3/8 | 37.5% |
| 5/8 | 62.5% |
| 7/8 | 87.5% |
| 1/9 | 11.11% |
| 2/9 | 22.22% |
| 4/9 | 44.44% |
| 5/9 | 55.55% |
| 7/9 | 77.77% |
| 8/9 | 88.88% |
| 1/10 | 10% |
| 1/11 | 9.09% |
| 2/11 | 18.18% |
| 3/11 | 27.27% |
| 5/11 | 45.45% |
| 9/11 | 81.81% |
| 1/12 | 8.33% |
| 1/15 | 6.66% |
| 1/20 | 5% |
| 1/25 | 4% |
| 1/40 | 2.5% |
| 1/50 | 2% |
| Rule | Trick |
|---|---|
| × 5 | (n × 10) ÷ 2 |
| × 11 | n × 10 + n |
| × 25 | (n × 100) ÷ 4 |
| × 50 | (n × 100) ÷ 2 |
| × 75 | (n × 300) ÷ 4 |
| × 125 | (n × 1000) ÷ 8 |
Formulas, shortcuts & tricks organized by topic.
AnalyticsAI-powered performance analysis.
Start practicing to see category-wise performance.
SettingsInstall QuantReflex on your device for offline use
Switch between light and dark theme
Choose a visual style
Adjusts question complexity
Set your daily question target
Allow skipping questions in drills
Play sound on answers and navigation
Vibrate on correct answers
Reduce animations for accessibility
Receive daily motivational push reminders
Learn how to use the app
App info and developer
Free user
View and edit your profile
Your complete guide to training with QuantReflex
QuantReflex is a precision training platform for mental math and quantitative aptitude. Build speed and accuracy through short, focused daily sessions.
Built for:
Here's how to get going in 60 seconds:
💡 Use the Daily Warmup on the Home tab every morning to start your streak and ease into the day.
5 questions, no timer. The fastest way to start sharp — use it every morning to build a daily habit before you dive deeper.
10 questions, 15 seconds each. Builds the muscle memory you need to solve under exam pressure — where every second counts.
10 questions in 3 minutes. The closest simulation of a real QA section — train your pacing so exam day feels familiar.
10 questions, one category. Drill weak topics — Percentages, TSD, Profit & Loss — until they stop costing you marks.
Pick any mix of categories, set count (1–100), and add a timer. Build sessions around your exact syllabus — not a preset someone else designed.
💡 Combine 2–3 weak categories in one session for high-density revision.
Retry every question you got wrong — they stay in your pool until you solve them correctly. The fastest path to recovering marks you're already losing.
💡 Finish every session with a Review Mistakes round. Mistakes not revisited are marks not recovered.
💡 Check your weakest category every week. If it's below 60%, run a Focus Training session on it before your next mixed drill.
Train faster. Improve accuracy. Build consistency.
Personalized guidance. Smarter practice. Faster improvement.
QuantReflex is a Progressive Web App: install it from your browser and use it offline.
Once installed, the app launches full-screen and works offline. Refresh after updates if needed.
💡 Installing gives you a faster, distraction-free training experience.
QuantReflex
QuantReflex is a performance-focused quantitative aptitude training platform built for competitive exam preparation. It combines speed drills, concept reinforcement, and mistake-led revision - so you improve both pace and accuracy with measurable consistency.
Unlike passive study apps, QuantReflex is action-first: every session is deliberate practice that directly reflects exam conditions.
Version 1.0.26
Stable release. All core features are live: multi-mode practice, learn vault, analytics, themes, custom formulas, and push notifications.
Free user
QuantReflex is actively developed. Features being explored for future releases:
💡 Features listed here are under consideration and not guaranteed - quality over speed, always.
QuantReflex was built with a single conviction: speed in quantitative reasoning isn't talent - it's trained reflex. This platform exists to make that training structured, measurable, and accessible to every serious exam aspirant.
For feedback, suggestions, or support, reach out at:
"From practice to percentile - one drill at a time."
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