One short rule, one line of work
A sutra is a short rule that turns a long sum into a step or two you can do in your head. Every trick here is built on one of them.
98 × 97
- 98 × 7 = 686
- 98 × 90 = 8820
- 686 + 8820 = 9506
98 × 97
- 98 is 2 below 100, and 97 is 3 below.
- 98 − 3 = 95, and 2 × 3 = 06.
- So the answer is 9506.
Step 1 of 3
- Square numbers ending in 5Ekādhikena PūrveṇaBy one more than the one before65²: 6 × 7 = 42, then 25, so 4225See how it works
- Subtract from 100, 1000, 10000Nikhilaṃ Navataścaramaṃ DaśataḥAll from 9 and the last from 101000 − 368: 9 − 3, 9 − 6, 10 − 8, so 632See how it works
- Multiply any two numbers in one lineŪrdhva-TiryagbhyāmVertically and crosswise21 × 13: 2, then 2 × 3 + 1 × 1 = 7, then 3, so 273See how it works
The 16 sutras and 13 sub-sutras are from Bharati Krishna Tirtha's book Vedic Mathematics, published in 1965. They are not found in the Vedas; each one is ordinary algebra you can check. See all 29 sutras
Pick how you learn
Tap one to start in that Mode. You can change it any time, and every Mode has the same tricks at its own pace.
Inside the game
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Bolt
Our robot teacher shows you each trick, and when an answer goes wrong, works it step by step on your own numbers.
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Math Lens
Point the camera at a number plate, a clock or a receipt and play puzzles made from its digits; the pictures never leave your device.
What you learn
Learn Vedic Math teaches the speed tricks from Bharati Krishna Tirtha's 1965 book Vedic Mathematics, with practice from counting to calculus, games, daily Stars and Boards. Lessons, problems and pictures are our own. Your progress stays on your device.
Where the tricks come from
The sixteen sutras are short rules from Bharati Krishna Tirtha's book, published in 1965. They are not found in the Vedas. We teach them because they are quick and fun, and we name the older Indian mathematicians where their work comes up.
For grown-ups
Nobody types a name or an email. Players under 13 never post anything online, and nothing reaches Google or YouTube until a Player chooses a video or a World board.