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  2. Pythagorean triple - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_triple

    If several such values happen to lie close together, the corresponding parabolas approximately coincide, and the triples cluster in a narrow parabolic strip. For instance, 38 2 = 1444, 2 × 27 2 = 1458, 3 × 22 2 = 1452, 5 × 17 2 = 1445 and 10 × 12 2 = 1440; the corresponding parabolic strip around n ≈ 1450 is clearly visible in the scatter ...

  3. Exam - Wikipedia

    en.wikipedia.org/wiki/Exam

    Cambodian students taking an exam in order to apply for the Don Bosco Technical School of Sihanoukville in 2008 American students in a computer fundamentals class taking an online test in 2001 An examination ( exam or evaluation ) or test is an educational assessment intended to measure a test-taker's knowledge , skill , aptitude , physical ...

  4. Typewriter - Wikipedia

    en.wikipedia.org/wiki/Typewriter

    These machines also introduced selectable "pitch" so that the typewriter could be switched between pica type (10 characters per inch) and elite type (12 per inch), even within one document. Even so, all Selectrics were monospaced – each character and letterspace was allotted the same width on the page, from a capital "W" to a period.