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Sagan gave an example that if the entire volume of the observable universe is filled with fine dust particles roughly 1.5 micrometers in size (0.0015 millimeters), then the number of different combinations in which the particles could be arranged and numbered would be about one googolplex. [8] [9]
By Archimedes's calculation, the universe of Aristarchus (roughly 2 light years in diameter), if fully packed with sand, would contain 10 63 grains. If the much larger observable universe of today were filled with sand, it would still only equal 10 95 grains. Another 100,000 observable universes filled with sand would be necessary to make a googol.
Square number 16 as sum of gnomons. In mathematics, a square number or perfect square is an integer that is the square of an integer; [1] in other words, it is the product of some integer with itself. For example, 9 is a square number, since it equals 3 2 and can be written as 3 × 3.
The square of an integer may also be called a square number or a perfect square. In algebra, the operation of squaring is often generalized to polynomials, other expressions, or values in systems of mathematical values other than the numbers. For instance, the square of the linear polynomial x + 1 is the quadratic polynomial (x + 1) 2 = x 2 ...
The largest pandigital number without redundant digits to be also a square number is 9814072356 = 99066 2. Two of the zeroless pandigital Friedman numbers are: 123456789 = ((86 + 2 × 7) 5 − 91) / 3 4, and 987654321 = (8 × (97 + 6/2) 5 + 1) / 3 4. A pandigital Friedman number without redundant digits is the square: 2170348569 = 46587 2 + (0 ...
Grouped by their numerical property as used in a text, Unicode has four values for Numeric Type. First there is the "not a number" type. Then there are decimal-radix numbers, commonly used in Western style decimals (plain 0–9), there are numbers that are not part of a decimal system such as Roman numbers, and decimal numbers in typographic context, such as encircled numbers.
⋮ g 1 = n th tower: 3↑3↑3↑3↑3↑3↑3↑...↑3 (number of 3s is given by the n − 1 th tower) where the number of 3s in each successive tower is given by the tower just before it. The result of calculating the third tower is the value of n, the number of towers for g 1.
Not only so, but the proportionate number of squares diminishes as we pass to larger numbers, Thus up to 100 we have 10 squares, that is, the squares constitute 1/10 part of all the numbers; up to 10000, we find only 1/100 part to be squares; and up to a million only 1/1000 part; on the other hand in an infinite number, if one could conceive of ...