Arabic numeral
noun
one of the written symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 that are used in the writing systems of many countries to represent numbers
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noun
one of the written symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 that are used in the writing systems of many countries to represent numbers
noun
a series of numbers in which the same number is added to each number to produce the next, for example 3, 6, 9, 12
noun
maths
a number that is used to form a system of counting. The usual system of counting uses base 10, and the binary system used in computers uses base 2.noun
a number written before a variable (=quantity that can change) that shows how much the variable is to be multiplied by
noun
a number that a group of two or more other numbers can be divided by exactly. 4 is a common factor of 8, 12, and 20
noun
a number that can be divided exactly by two or more other numbers. 12 is a common multiple of 2, 3, and 4
noun
maths
the cube of a number is the larger number that is the result of multiplying the number by itself twice. For example, the cube of 2 is 2 x 2 x 2, which is 8.noun
the cube root of a number is the smaller number that you multiply by itself twice to make the number. For example, the cube root of 8 is 2.
noun
a number in a counting system based on the number ten that consists of numbers on either side of a decimal point. 0.5, 25.75, and 873.4 are all decimals.
noun
the number that is below the line in a fraction. In ¾, 4 is the denominator. The number above the line is the numerator.
noun
a series of numbers in which each number is multiplied by a particular quantity in order to get the next number, for example 1, 5, 25, 125
noun
the highest number that can be divided exactly into each number in a particular set
noun
in mathematics, a variable whose value does not depend on the value of something else changing
noun
economics
a number that shows the price, value, or level of something compared with something elsenoun
maths
a small number written or printed above and to the right of a number. It shows how many times the main number is to be multiplied by itself.noun
a number that shows the change in the level of something such as a price or unemployment, compared with an earlier time
noun
British
the lowest number that can be divided by all the numbers in a setnoun
maths
a number that is in the middle of a set when they are arranged in order. For example, in the numbers 1, 3, 4, 8, 9, the median is 4noun
a sign or word that represents an amount or quantity. 1, 2, 3 etc and ‘one’, ‘two’, ‘three’ etc are numbers
noun
a number that marks something in a way that separates it from everything else of its type, so that you can easily find it or discover who it belongs to
noun
a situation in which decisions are based on points or numbers, not on other qualities that may be more important
noun
in mathematics, a number written as the symbol π that is used to show the relationship between the distance around a circle and the distance across it
noun
a number that can only be divided exactly by itself and the number 1, for example 7
noun
maths
in mathematics, the amount that is left when one number cannot be divided exactly by anothernoun
maths
the root of a number is another number that, when multiplied by itself a particular number of times, equals that number. For example, 3 is the square root of 9 and the cube root of 27.noun
a number that you multiply by itself to produce a particular number. For example, the square root of 9 is 3.
noun
a number that shows how much smaller or larger a number in a set of numbers is from the average of the set
noun
a number such as 1, 32, 144 etc, rather than a number such as 0.1, 0.32, 1/2, 3/4 etc
a number that can be exactly divided by 2, such as 2, 4, 6, 8 etc
a number that cannot be exactly divided by 2, such as 1, 3, 5, 7 etc

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the activity of exploring abandoned buildings and other manmade structures
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