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  2. Zacharias Dase - Wikipedia

    en.wikipedia.org/wiki/Zacharias_Dase

    He multiplied two 20-digit numbers in 6 minutes; two 40-digit numbers in 40 minutes; and two 100-digit numbers in 8 hours 45 minutes. The famous mathematician Carl Friedrich Gauss commented that someone skilled in calculation could have done the 100-digit calculation in about half that time with pencil and paper.

  3. High availability - Wikipedia

    en.wikipedia.org/wiki/High_availability

    10.98 hours 3.65 hours 50.40 minutes ... 4.38 hours 65.7 minutes ... Another memory trick to calculate the allowed downtime duration for an " ...

  4. Clock angle problem - Wikipedia

    en.wikipedia.org/wiki/Clock_angle_problem

    The time is usually based on a 12-hour clock. A method to solve such problems is to consider the rate of change of the angle in degrees per minute. The hour hand of a normal 12-hour analogue clock turns 360° in 12 hours (720 minutes) or 0.5° per minute. The minute hand rotates through 360° in 60 minutes or 6° per minute. [1]

  5. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    1.44 minutes, or 86.4 seconds. Also marketed as a ".beat" by the Swatch corporation. moment: 1/40 solar hour (90 s on average) Medieval unit of time used by astronomers to compute astronomical movements, length varies with the season. [4] Also colloquially refers to a brief period of time. centiday 0.01 d (1 % of a day) 14.4 minutes, or 864 ...

  6. Repeater (horology) - Wikipedia

    en.wikipedia.org/wiki/Repeater_(horology)

    The decimal repeater works like the minute repeater, but instead of chiming the quarter hours followed by minutes, it sounds the number of ten-minute intervals after the last hour and then the minutes. For example, if the time is 2:49 then the decimal repeater will sound 2 low tones representing 2 hours, 4 sequence tones representing 40 minutes ...

  7. Is 4 hours of sleep enough? What sleeping too little does to ...

    www.aol.com/news/4-hours-sleep-enough-sleeping...

    Infants (4–12 months old): 12–16 hours, including naps Toddlers (1–2 years old): 11–14 hours, including naps Young children (3–5 years old): 10–13 hours, including naps

  8. Decimal time - Wikipedia

    en.wikipedia.org/wiki/Decimal_time

    3 different representations of 3 hours 86 minutes decimal time by Delambre (9:15:50 a.m.) The colon (:) was not yet in use as a unit separator for standard times, and is used for non-decimal bases. The French decimal separator is the comma (,), while the period (.), or "point", is used in English. Units were either written out in full, or ...

  9. Here’s the last day to send your gifts in time for the holidays

    www.aol.com/last-day-send-gifts-time-143042135.html

    USPS notes that the actual delivery date varies based on conditions including origin, destination and post office acceptance time. FedEx Here are the shipping deadlines for December 24 delivery: