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  2. System of linear equations - Wikipedia

    en.wikipedia.org/wiki/System_of_linear_equations

    is a system of three equations in the three variables x, y, z. A solution to a linear system is an assignment of values to the variables such that all the equations are simultaneously satisfied. In the example above, a solution is given by the ordered triple since it makes all three equations valid.

  3. List of teams that have overcome 3–0 series deficits - Wikipedia

    en.wikipedia.org/wiki/List_of_teams_that_have...

    The following is the list of teams that have overcome 3–0 series deficits in a best-of-seven playoff series, otherwise known as a reverse sweep. The listed teams won four consecutive games after losing the first three. Unsuccessful comebacks are also listed, in which teams evened a series after being behind 3–0, then lost game seven of the series.

  4. 40-yard dash - Wikipedia

    en.wikipedia.org/wiki/40-yard_dash

    40-yard dash The 40-yard dash is a sprint covering 40 yards (36.576 m). It is primarily run to evaluate the speed and acceleration of American football players by scouts, particularly for the NFL draft but also for collegiate recruiting. A player's recorded time can have a heavy impact on his prospects in college or professional football. This was traditionally only true for the "skill ...

  5. Divisibility rule - Wikipedia

    en.wikipedia.org/wiki/Divisibility_rule

    The basic rule for divisibility by 4 is that if the number formed by the last two digits in a number is divisible by 4, the original number is divisible by 4; [2] [3] this is because 100 is divisible by 4 and so adding hundreds, thousands, etc. is simply adding another number that is divisible by 4.

  6. Greatest common divisor - Wikipedia

    en.wikipedia.org/wiki/Greatest_common_divisor

    Largest integer that divides given integers. In mathematics, the greatest common divisor(GCD) of two or more integers, which are not all zero, is the largest positive integer that divideseach of the integers. For two integers x, y, the greatest common divisor of xand yis denoted gcd(x,y){\displaystyle \gcd(x,y)}.

  7. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    Fibonacci sequence. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn . The sequence commonly starts from 0 and 1, although some authors start the sequence from 1 and 1 or sometimes ...

  8. Magic square - Wikipedia

    en.wikipedia.org/wiki/Magic_square

    The smallest (and unique up to rotation and reflection) non-trivial case of a magic square, order 3. In recreational mathematics, a square array of numbers, usually positive integers, is called a magic square if the sums of the numbers in each row, each column, and both main diagonals are the same.

  9. Four last things - Wikipedia

    en.wikipedia.org/wiki/Four_last_things

    The four outer discs depict (clockwise from top left) Death, Judgment, Heaven, and Hell. In Christian eschatology, the Four Last Things ( Latin: quattuor novissima) [1] are Death, Judgment, Heaven, and Hell, the four last stages of the soul in life and the afterlife. [2] [3] They are often commended as a topic for pious meditation; Saint Philip ...