Kcs
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kcs education, delivers quantitative aptitude courseseries of articles on various topics of quantitative aptitude are presented here• positive integers = {1, 2, 3, 4, 5, 6…numbers: ten digits in hindu-arabic system: 0,1,2,3,4,5,6,7,8,9 numeral: a number is denoted by a group of digits called numeral a) face value: the face value of a digit in a numeral is its own value example: 1357 face value of 1 is 1 face value of 3 is 3 face value of 5 is 5 face value of 7 is 7 b) place value: • place value of unit digit = unit digit x 1 • place value of tens digit = tens digit x 10 • place value of hundreds digit = hundreds digit x 100 types of numbers: (i) natural numbers: 1, 2, 3, 4, 5, 6, 7……firstly, we will discuss number system(ii) whole numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8… (iii) integers: … -3, -2, -1, 0, 1, 2, 3, 4…} • negative integers = {-1, -2, -3, -4…} • non-negative integers = {0, 1, 2, 3, 4, 5, 6…} (iv) even numbers: divisible by 2 • 0, 2, 4, 6, 8, 10, 12… (v) odd numbers: not divisible by 2 • 1,3,5,7,9,11… (vi) prime number: natural numbers with exactly two factors namely itself and one • prime numbers less than 100 are 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97
Chennai (Tamil Nadu)
