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Learn to do mental math from grocery prices to company valuations
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Founder's Math is a trainer for the arithmetic you do without a calculator. It begins with grocery prices, restaurant bills and tips, then climbs towards the figures you meet at work, so the skill carries over rather than staying theoretical.
Every technique is shown once with a real example and then practised until it becomes automatic. Heron, the coach inside the app, picks your level and pace on day one and keeps a blog of puzzles, paradoxes and viral arguments, each explained with sources.
