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  2. Multiple (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Multiple_(mathematics)

    In mathematics, a multiple is the product of any quantity and an integer. [1] In other words, for the quantities a and b, it can be said that b is a multiple of a if b = na for some integer n, which is called the multiplier. If a is not zero, this is equivalent to saying that / is an integer.

  3. Multiplication table - Wikipedia

    en.wikipedia.org/wiki/Multiplication_table

    Cycles of the unit digit of multiples of integers ending in 1, 3, 7 and 9 (upper row), and 2, 4, 6 and 8 (lower row) on a telephone keypad. Figure 1 is used for multiples of 1, 3, 7, and 9. Figure 2 is used for the multiples of 2, 4, 6, and 8. These patterns can be used to memorize the multiples of any number from 0 to 10, except 5.

  4. Least common multiple - Wikipedia

    en.wikipedia.org/wiki/Least_common_multiple

    For example, 10 is a multiple of 5 because 5 × 2 = 10, so 10 is divisible by 5 and 2. Because 10 is the smallest positive integer that is divisible by both 5 and 2, it is the least common multiple of 5 and 2. By the same principle, 10 is the least common multiple of −5 and −2 as well.

  5. Three cups problem - Wikipedia

    en.wikipedia.org/wiki/Three_cups_problem

    Changing 1 right cup and 1 wrong cup, the situation remains the same. Changing 2 right cups results in a situation with 3 wrong cups, after which the next move restores the original status of 1 wrong cup. Thus, any number of moves results in a situation either with 3 wrongs or with 1 wrong, and never with 0 wrongs.

  6. Gill (unit) - Wikipedia

    en.wikipedia.org/wiki/Gill_(unit)

    Prior to metrication, in the United Kingdom, the standard single measure of spirits in a pub was 1 ⁄ 6 gill (23.7 mL) in England and Northern Ireland, and either 15 gill (28.4 mL) or 14 gill (35.5 mL) in Scotland. After metrication, this was replaced by measures of either 25 or 35 millilitres (0.176 or 0.246 gi), at the discretion ...

  7. 1/8 - Wikipedia

    en.wikipedia.org/wiki/1/8

    1/8 or 1 ⁄ 8 may refer to: January 8 (month-day date notation) 1 August (day-month date notation) the Fraction one eighth, 0.125 in decimal, and 12.5% in percentage;

  8. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    1 3 = 1 up 1; 2 3 = 8 down 3; 3 3 = 27 down 1; 4 3 = 64 down 3; 5 3 = 125 up 1; 6 3 = 216 up 1; 7 3 = 343 down 3; 8 3 = 512 down 1; 9 3 = 729 down 3; 10 3 = 1000 up 1; There are two steps to extracting the cube root from the cube of a two-digit number. For example, extracting the cube root of 29791. Determine the one's place (units) of the two ...

  9. Multiplicative group of integers modulo n - Wikipedia

    en.wikipedia.org/wiki/Multiplicative_group_of...

    The exponent of the group, that is, the least common multiple of the orders in the cyclic groups, ... 4, 5, 7, 8. Since 8 is congruent to −1 modulo 9, ...