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For higher powers of ten, naming diverges. The Indian system uses names for every second power of ten: lakh (10 5), crore (10 7), arab (10 9), kharab (10 11), etc. In the two Western systems, long and short scales, there are names for every third power of ten. The short scale uses million (10 6), billion (10 9), trillion (10 12), etc.
The Devanagari numerals are the symbols used to write numbers in the Devanagari script, predominantly used for northern Indian languages. They are used to write decimal numbers, instead of the Western Arabic numerals .
Like many Indo-Aryan languages, Hindustani (Hindi-Urdu) has a decimal numeral system that is contracted to the extent that nearly every number 1–99 is irregular, and needs to be memorized as a separate numeral.
The Hindu–Arabic system is designed for positional notation in a decimal system. In a more developed form, positional notation also uses a decimal marker (at first a mark over the ones digit but now more commonly a decimal point or a decimal comma which separates the ones place from the tenths place), and also a symbol for "these digits recur ad infinitum".
Far larger finite numbers than any of these occur in modern mathematics. For instance, Graham's number is too large to reasonably express using exponentiation or even tetration. For more about modern usage for large numbers, see Large numbers. To handle these numbers, new notations are created and used. There is a large community of ...
The number sign is used with digits for enumerated lists and numerical sequences. [3] It can appear above, below, or before a digit or sequence of digits. [3] For example, 𑂽१२३. 𑂼 The enumeration sign is a spacing version of the number sign. [10] It always appears before a digit or sequence of digits (never above or below). 𑂾
Write the amount in numbers in the box with the dollar sign. On the row beneath “Pay to the order of,” write the payment amount in words. Sign your name on the line in the bottom right.
To put in perspective the size of a googol, the mass of an electron, just under 10 −30 kg, can be compared to the mass of the visible universe, estimated at between 10 50 and 10 60 kg. [5] It is a ratio in the order of about 10 80 to 10 90 , or at most one ten-billionth of a googol (0.00000001% of a googol).