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  2. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    This is the minimum number of characters needed to encode a 32 bit number into 5 printable characters in a process similar to MIME-64 encoding, since 85 5 is only slightly bigger than 2 32. Such method is 6.7% more efficient than MIME-64 which encodes a 24 bit number into 4 printable characters. 89

  3. Letter frequency - Wikipedia

    en.wikipedia.org/wiki/Letter_frequency

    The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...

  4. Word ladder - Wikipedia

    en.wikipedia.org/wiki/Word_ladder

    Word ladder (also known as Doublets, [1] word-links, change-the-word puzzles, paragrams, laddergrams, [2] or word golf) is a word game invented by Lewis Carroll. A word ladder puzzle begins with two words, and to solve the puzzle one must find a chain of other words to link the two, in which two adjacent words (that is, words in successive ...

  5. Urdu alphabet - Wikipedia

    en.wikipedia.org/wiki/Urdu_alphabet

    Alif is the first letter of the Urdu alphabet, and it is used exclusively as a vowel. At the beginning of a word, alif can be used to represent any of the short vowels: اب ab, اسم ism, اردو Urdū. For long ā at the beginning of words alif-mad is used: آپ āp, but a plain alif in the middle and at the end: بھاگنا bhāgnā.

  6. Crossword - Wikipedia

    en.wikipedia.org/wiki/Crossword

    When an answer is composed of multiple or hyphenated words, some crosswords (especially in Britain) indicate the structure of the answer. For example, "(3,5)" after a clue indicates that the answer is composed of a three-letter word followed by a five-letter word. Most American-style crosswords do not provide this information.

  7. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    It is the smallest common multiple of one, two, three, four and six. There is still a special word for "dozen" in English, and by analogy with the word for 10 2, hundred, commerce developed a word for 12 2, gross. The standard 12-hour clock and common use of 12 in English units emphasize the utility of the base.

  8. Mnemonic peg system - Wikipedia

    en.wikipedia.org/wiki/Mnemonic_peg_system

    5: Picture bees flying from a cup of lemonade as if it is a hive. 9: Picture a beetle climbing onto a chick nest. 2: Picture a newt with angel wings and a halo. 6: Picture a jaguar lifting weights. The next step is to link the items with some sort of dramatic action, in order to record the order in which they appear.

  9. V2 word order - Wikipedia

    en.wikipedia.org/wiki/V2_word_order

    Both end with positions for (5) non-finite verb forms, (6) objects, and (7), adverbials. In main clauses, the V2 constraint holds. The finite verb must be in position (2) and sentence adverbs in position (4). The latter include words with meanings such as 'not' and 'always'.