Making Sense of Numbers
Like Duolingo, but for Making Sense of Numbers. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A short one: 11 levels across 2 sections, about 22 minutes end to end, roughly 4 days at five minutes a day. It moves through Running Immediate Sanity Checks and Decoding Context and Framing. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in Making Sense of Numbers
- Rough powers of ten catch massive impossibilities in seconds without needing an exact spreadsheet
- Rounding 1,000 deals per 5-day work week equals 200 deals per rep per day
- A standard 8-hour workday has roughly 500 minutes, meaning closing a deal every 2.5 minutes non-stop
- Dividing 300 billion by 300 million yields 1,000 cups per person per year
- Dividing roughly 1,000 cups across ~365 days gives close to 3 cups per person every day
- Per-person daily scaling translates incomprehensible billions into relatable daily habits
- Every individual is strictly bound by 24 physical hours in a day
- Adding reported activity blocks (10 + 8 + 3 + 5 = 26 hours) exceeds total possible daily time
- Physical boundary limits (hours per day, stomach capacity, physical space) automatically invalidate inflated self-reports
- A baseline population anchor shows 200M jet owners would mean most citizens are jet owners
- A median salary benchmark exposes when claimed savings exceed what typical households earn in a year
- A huge percentage jump on an extremely small baseline still amounts to a negligible real-world difference
- Doubling a microscopic chance means the event remains virtually non-existent in absolute terms
- Assessing real impact requires converting percentage claims back to natural counts out of a population
- Percentage losses reduce the base amount, making subsequent percentage gains build from a smaller foundation
- A 50% drop cuts the total in half, requiring the remainder to double (+100%) to get back to even
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Making Sense of Numbers the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
A sales rep claims to close 1,000 deals in a normal 5-day work week. How many is that each day?
Get it right to open this lesson and 10 more in the app.
Where Making Sense of Numbers takes you
Develop an instinct for spotting exaggerated claims, deceptive percentages, and impossible statistics. Master simple mental checks to judge whether numbers in the news and daily life actually hold up.
- 1
Running Immediate Sanity Checks
- Order-of-Magnitude Gut Checks
- Deconstructing Percentages and Baselines
- 2
Decoding Context and Framing
- Finding the Missing Denominator
- Spotting False Precision and Visual Distortions
2 sections · 4 units · 11 levels. Built to play, not to enroll.
You pick the voice
Making Sense of Numbers is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
More Math on Tomo
Spotting Misleading Numbers
Cut through confusing statistics, sensational headlines, and deceitful graphs. Build practical mental checks to test whether numerical claims in daily life actually hold up.
Everyday Number Sense
Build an instinctive radar for whether real-world numbers make sense. Learn to spot misleading statistics, scale errors, and deceptive charts in headlines and daily life.
Math for Real Life
Stop wondering when you'll ever use math and start using it to solve everyday puzzles. From splitting a pizza to planning a trip, see how numbers make life easier.
The Hidden Power of X
Stop memorizing formulas and start solving life's puzzles. Discover how invisible numbers, flexible patterns, and the laws of chance help us predict the future and map the unknown.
Making Sense of Algebra
Algebra isn't a wall of random rules—it is just balancing a scale and solving a mystery. Learn to undo equations step by step, spot the right moves without guessing, and finally feel confident with math.
Mastering 5th Grade Math
Stop feeling stuck and start solving problems like a pro. Learn the tricks to handle big numbers and shapes so you can tackle real-world challenges with confidence.
Start Making Sense of Numbers today.
Download Tomo, search Making Sense of Numbers, and play your first lesson in under a minute.