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  2. 1,000,000,000 - Wikipedia

    en.wikipedia.org/wiki/1,000,000,000

    Mathematics portal; 1,000,000,000 (one billion, short scale; one thousand million or one milliard, one yard, [1] long scale) is the natural number following ...

  3. 1,000,000 - Wikipedia

    en.wikipedia.org/wiki/1,000,000

    Money: A U.S. dollar bill of any denomination weighs 1 gram (0.035 oz). There are 454 grams in a pound. One million dollar bills would weigh 1 megagram (1,000 kg; 2,200 lb) or 1 tonne (just over 1 short ton). Time: A million seconds, 1 megasecond, is 11.57 days. In Indian English and Pakistani English, it is also expressed as 10 lakh.

  4. Googol - Wikipedia

    en.wikipedia.org/wiki/Googol

    A googol is approximately equal to ! (factorial of 70). Using an integral , binary numeral system , one would need 333 bits to represent a googol, i.e., 10 100 = 2 ( 100 / l o g 10 2 ) ≈ 2 332.19280949 {\displaystyle 10^{100}=2^{(100/\mathrm {log} _{10}2)}\approx 2^{332.19280949}} .

  5. Orders of magnitude (numbers) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(numbers)

    1/52! chance of a specific shuffle Mathematics: The chances of shuffling a standard 52-card deck in any specific order is around 1.24 × 10 −68 (or exactly 1 ⁄ 52!) [4] Computing: The number 1.4 × 10 −45 is approximately equal to the smallest positive non-zero value that can be represented by a single-precision IEEE floating-point value.

  6. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    Add 5 + 9 = 14 so 4 is placed on the left side of the result and carry the 1. result: 49; Similarly add 7 + 5 = 12, then add the carried 1 to get 13. Place 3 to the result and carry the 1. result: 349; Add the carried 1 to the highest valued digit in the multiplier, 7 + 1 = 8, and copy to the result to finish. Final product of 759 × 11: 8349

  7. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    The arrangement of digits on calculator and other numeric keypads with the 7-8-9 keys two rows above the 1-2-3 keys is derived from calculators and cash registers. It is notably different from the layout of telephone Touch-Tone keypads which have the 1-2-3 keys on top and 7-8-9 keys on the third row.

  8. 1000 (number) - Wikipedia

    en.wikipedia.org/wiki/1000_(number)

    1 × 10 3 —in engineering notation, which for this number coincides with: 1 × 10 3 exactly—in scientific normalized exponential notation; 1 E+3 exactly—in scientific E notation. The SI prefix for a thousand units is "kilo-", abbreviated to "k"—for instance, a kilogram or "kg" is a thousand grams.

  9. List of sums of reciprocals - Wikipedia

    en.wikipedia.org/wiki/List_of_sums_of_reciprocals

    Then the triangle is in Euclidean space if the sum of the reciprocals of p, q, and r equals 1, spherical space if that sum is greater than 1, and hyperbolic space if the sum is less than 1. A harmonic divisor number is a positive integer whose divisors have a harmonic mean that is an integer. The first five of these are 1, 6, 28, 140, and 270.