309.--THE FORTY-NINE COUNTERS.

From Amusements in Mathematics by Henry Ernest Dudeney.

The counters may be arranged in this order:--

A1, B2, C3, D4, E5, F6, G7. F4, G5, A6, B7, C1, D2, E3. D7, E1, F2, G3, A4, B5, C6. B3, C4, D5, E6, F7, G1, A2. G6, A7, B1, C2, D3, E4, F5. E2, F3, G4, A5, B6, C7, D1. C5, D6, E7, F1, G2, A3, B4.

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309.--THE FORTY-NINE COUNTERS.: Amusements in Mathematics by Henry Ernest Dudeney | amphi