Sequenze

Data una certa sequenza di numeri bisogna individuare il prossimo valore (1,  2,  3,  4,  5,  …) oppure il valore mancante (1, 2,  …,  4,  5, 6)

  1. 1, 3, 5, 7, 9, ♥
  2. 1, 3, 6, 10, 15, 21, ♥
  3. 1, 4, 9, 16, 25, ♥
  4. 1, 8, 27, 64, 125, ♥
  5. 1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, 31131211131221, 13211311123113112211, ♥
  6. 2, 3, 4, 12, 6, 23, 8, 36, 10, 51, 12, ♥
  7. 2, 3, 5, 7, 11, ♥
  8.  2, 3, 7, 13, 27, ♥, ♥
  9. 2, 4, 6, 8, 10, ♥
  10. 2, 8, 4, 7, 8, 6, 16, 5, ♥, ♥
  11. 3, 1, 4, 1, 5, 9, ♥
  12. 3, 5, 9, 17, 33, 65, ♥
  13. 5, 14, 32, 68, 140, 284, ♥
  14. 6, 7, 4, 6, 5, 4, 5, 5, 2, ♥
  15. 7, 8, 10, 14, 22, 38, 70, ♥
  16. 8, 15, 29, 57, 113, 225, ♥
  17. 9, 18, 16, 14, 23, 10, ♥, ♥
  18. 11, 12, 25, 76, 77, 155, 466, 467, ♥
  19. 11, 33, 21, 63, 51, 153, ♥, ♥
  20. 16, 152, 32, 76, 64, 38, 128, ♥, ♥
  21. 19, 22, 31, 58, ♥
  22. 20, 42, 36, ♥, ♥, 74, 68, 90
  23. 23, 64, 55, 70, ♥, ♥, 117, 158
  24. ♥, ♥, 37, 62, 42, 65, 47, 68
  25. 42, 86, 74, 32, ♥, ♥, 22, 66
  26. ♥, ♥, 44, 41, 36, 33, 28, 25, 20
  27. 60, 95, 52, ♥, ♥, 78, 112, 147
  28. 79, 96, 89, 106, 99, 116, ♥
  29. 86, 105, 78, , , 88, 106, 125
  30. 87, 73, 103, 89, ♥, 105, 135, ♥
  31. 200, 196, 180, 116, ♥

A volte compaiono le lettere dell’alfabeto oppure lettere e numeri

Lettere (21)

  1. A, T, ♥, M, H, ♥
  2. D, T, E, R, F, P, G, ♥
  3. ♥, P, L, F, B
  4. ♥, Q, N, I, F
  5. S, Q, N, H, ♥, T
  6. V, S, O, L, F, ♥

Lettere (21) e numeri

  1. B, 43, V, 36, Q, 31, N, 24, ♥, ♥
  2. B, 76, O, 64, C, 52, P, 40, ♥, ♥
  3. E, 114, G, 96, I, 78, ♥, 60, O, ♥
  4. H, 111, L, 93, N, 75, ♥, 57, R, ♥
  5. O, 64, I, 32, E, 16, ♥, ♥
  6. ♥, ♥, T, 7, Q, 11, N, 15, I

Le sequenze compaiono, con tante varianti, nelle competizioni scolastiche

nei test d’ammissione

  •  Medicina…

nei concorsi


Risorse online


  1. OEIS – The On-Line Encyclopedia of Integer Sequences
  2. BASE Cinque: Serie e sequenze di numeri
  3. Concorsando – Guida sulle serie numericheGuida sulle serie alfanumeriche – TEST DI LOGICA

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  1. Logica
  2. Serie numeriche, alfabetiche, alfanumeriche

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