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keep getting closer and closer to 1 | External Links | Dofollow |
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verification with Wolfram|Alpha shows that this is correct | External Links | Dofollow |
Presh Talwalkar wrote up several approaches to this classic problem | External Links | Dofollow |
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mentally squaring 2-digit numbers | External Links | Dofollow |
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square that estimation, you get roughly 130.167 | External Links | Dofollow |
UK-based math tutor Colin Beveridge | External Links | Dofollow |
The Mathematical Ninja takes a square root | External Links | Dofollow |
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square that estimate, you get roughly 129.997 | External Links | Dofollow |
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a video about a seemingly simple game | External Links | Dofollow |
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Winning Ways for Your Mathematical Plays, vol. 4 | External Links | Dofollow |
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