Numbers

Numbers Types of Numbers Integers are whole numbers (both positive and negative, including zero). So they are . . . , -2, -1, 0, 1, 2, . . . . So a negative integer is a negative whole number, such as -3, -10 or -23. Natural numbers are... More

Numbers Types of Numbers Integers are whole numbers (both positive and negative, including zero). So they are . . . , -2, -1, 0, 1, 2, . . . . So a negative integer is a negative whole number, such as -3, -10 or -23. Natural numbers are positive integers. A rational number is a number which can be written as a fraction where numerator and denominator are integers (where the top and bottom of the fraction are whole numbers). For example 1/2, 4, 1. 75 (=7/4). Irrational numbers are numbers which cannot be written as fractions, such as pi and Ö2. In decimal form these numbers go on forever and the same pattern of digits are not repeated. Square numbers are numbers which can be obtained by multiplying another number by itself. E. g. 36 is a square number because it is 6 x 6 . Surds are numbers left written as Ön , where n is positive but not a square number. E. g. Ö2 (see surds ). Prime numbers are numbers above 1 which cannot be divided Less