Question

Match the following

$$\begin{array}{cc}ColumnA& ColumnB\\ 1.A=\{x:xisanoddnaturalnumber\}& a.\{\frac{1}{2},\frac{1}{3},\frac{2}{3},\frac{3}{4},\frac{3}{5},\frac{5}{7}\}\\ 2.B=\{x:x=(n^2)\},n\in Nandx<100& b.\{1,4,9,16,25,........10000\}\\ 3.C=\{x:x=\frac{n}{n+2},wherenisanaturalnumberand1\le n\le 6\}& c.\{1,4,9,16,25,36,49,64,81\}\\ 4.D=\{x:xisaletterofthewordTRIGONOMETRY\}& d.\{G,E,I,M,N,O,R,T,Y\}\\ & e.\{1,3,5,7,9,...............\}\\ & \end{array}$$

• A. 1 - e, 2 - b, 3 - a, 4 - d
• B. 1 - e, 2 - c, 3 - a, 4 - d
• C. 1 - c, 2 - b, 3 - a, 4 - d
• D. 1 - c, 2 - b, 3 - d, 4 - e

Answer 1

The correct option is B

1 - e, 2 - c, 3 - a, 4 - d

A = Set of all odd natural numbers

= {1, 3, 5, 7, 9, ------} that is (e) in column B

B = Set of all squares of natural numbers such that squares are less than 100

= {1, 4, 9, 16, 25, 36, 49, 64, 81} that is (c) in column B

C = { $\frac{1}{3}$, $\frac{2}{4}$, $\frac{3}{5}$, $\frac{4}{6}$, $\frac{5}{7}$, $\frac{6}{8}$}

= { $\frac{1}{3}$, $\frac{1}{2}$, $\frac{3}{5}$, $\frac{2}{3}$, $\frac{5}{7}$, $\frac{3}{4}$}, that is (a) in column B

D = Set of letters of the word TRIGONOMETRY

= {G, E, I, M, N, O, R, T, Y} that is (d) in column B