This guy does some fast thinking math, concluding with squaring a 5 digit number in his head with a bit of insight into his method.
posted by deathcow 1 decade 2 years 10 months 3 weeks ago • 334 viewsTED talks
Created: 1 decade 6 years 8 months 3 weeks ago
Updated: 6 years 10 months 4 weeks ago
Views: 18,547
Updated: 6 years 10 months 4 weeks ago
Views: 18,547
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