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5 (number) - Wikipedia, the free encyclopedia |
 | | Five is the only prime number to end in the digit 5, because all other numbers written with a 5 in the ones-place under the decimal system are multiples of five. |
 | | 5 is also a Pell number and a Markov number, appearing in solutions to the Markov Diophantine equation: (1, 2, 5), (1, 5, 13), (2, 5, 29), (5, 13, 194), (5, 29, 433),... |
 | | On most telephones, the 5 key is associated with the letters J, K, and L, but on the BlackBerry it is the key for G and H. |
| en.wikipedia.org /wiki/5_(number) (1664 words) |
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