Math Class VIII 1 Question Bank

EDULA

BZ

INTE

RNAT

IONAL

Section I : Sets

1. Describe the following sets in roster form :

(i) 2{ / , , 2 5}x x n n N n=

(ii) {x / x is composite number and 11 < x < 25}

(iii) {x / x W, x is divisible by 4 and 6, x 100}

(iv) {x / x is two digit number whose sum of digits is 7}

(v) / , and 53

nx x n N n

n

=

+

(vi)2 1

/ , and 102 3

nx x n W n

n

+ =

+

(vii) 2{ / , 20}x x W x