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  2. 7 - Wikipedia

    en.wikipedia.org/wiki/7

    [17] 7 is also a centered hexagonal number. [18] 7 is the only number D for which the equation 2 n − D = x 2 has more than two solutions for n and x natural. In particular, the equation 2 n − 7 = x 2 is known as the Ramanujan–Nagell equation. 7 is one of seven numbers in the positive definite quadratic integer matrix representative of all ...

  3. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    For example, if the threshold value for the first digit is b (i.e. 1) then a (i.e. 0) marks the end of the number (it has just one digit), so in numbers of more than one digit, first-digit range is only b–9 (i.e. 1–35), therefore the weight b 1 is 35 instead of 36.

  4. Vehicle registration plates of India - Wikipedia

    en.wikipedia.org/wiki/Vehicle_registration...

    Currently, Gujarat RTO has revised the amount for chosen number (not unique numbers like single, double digit), which is ₹ 1000 for 2-wheeler vehicles and ₹ 5000 for 4-wheeler vehicles. In Andhra Pradesh the RTO Follows the Auction system for unique numbers. The highest bidder gets the number.

  5. List of 2024 box office number-one films in the United States

    en.wikipedia.org/wiki/List_of_2024_box_office...

    During the weekend, Inside Out 2 broke Incredibles 2 ' s records ($608.6 million) for the highest-grossing animated film and highest-grossing Pixar film of all time at the domestic box office. [32] 31: August 4, 2024: $96,809,328: Deadpool & Wolverine broke The Passion of the Christ ' s record ($370.7 million) for the highest grossing R-rated ...

  6. Hexadecimal - Wikipedia

    en.wikipedia.org/wiki/Hexadecimal

    In most current use cases, the letters A–F or a–f represent the values 10–15, while the numerals 0–9 are used to represent their decimal values.. There is no universal convention to use lowercase or uppercase, so each is prevalent or preferred in particular environments by community standards or convention; even mixed case is used.

  7. Digit sum - Wikipedia

    en.wikipedia.org/wiki/Digit_sum

    Digit sums and digital roots can be used for quick divisibility tests: a natural number is divisible by 3 or 9 if and only if its digit sum (or digital root) is divisible by 3 or 9, respectively. For divisibility by 9, this test is called the rule of nines and is the basis of the casting out nines technique for checking calculations.

  8. Signed-digit representation - Wikipedia

    en.wikipedia.org/wiki/Signed-digit_representation

    In mathematical notation for numbers, a signed-digit representation is a positional numeral system with a set of signed digits used to encode the integers.. Signed-digit representation can be used to accomplish fast addition of integers because it can eliminate chains of dependent carries.

  9. Factorial number system - Wikipedia

    en.wikipedia.org/wiki/Factorial_number_system

    The factorial number system is a mixed radix numeral system: the i-th digit from the right has base i, which means that the digit must be strictly less than i, and that (taking into account the bases of the less significant digits) its value is to be multiplied by (i − 1)! (its place value).