Roster Method

Q. The set of natural numbers less than 15 and divisible by 3 in roster form is .

1. $\{3,6,9,12\}$
2. $\{1,2,6,9,12\}$
3. $\{1,3,5,12,15\}$
4. $\{3,6,9,12,15\}$

Q. The roster form of the set $\{x:x=\frac{n}{2n+1},\text{where}nϵN\text{and}n<4\}$ is ________.

Q. The set {$x:x$ is a letter in the word SELECT} in roster form is

1. $\left(S,E,L,C,T\right\}$
2. $\left(S,E,L\right\}$
3. $\left(S,E,L,C\right\}$

Q.

Write the set $A=\left\{x:xisamonthoftheyearhaving31days\right\}$ in roster form.

Q.

Write the given set in roster form.

A = {x | x is a letter of the word ‘number’}

Q.

Write the set $D=$$\{$days of the weeks $\}$ in roster form.

Q.

Which of the following is not a prime number?

1. $11$

2. $21$

3. $31$

4. $41$

Q.

Write the roster form for the given set:

“Set of all months in a year having at least $30$ days.”

Q.

If $\left|z+4\right|$ less than or equal to $3$, then the maximum value of $\left|z+1\right|$ is

1. $4$

2. $10$

3. $6$

4. $0$

Q.

Write all integers between:

$-4\mathrm{and}2$

Q.

The roster form of the set $\{x:x=2r+3,\text{where}r\in I\text{and}-2<r\le 3\}$.

1. $\{1,3,5,7,9\}$

2. $\{0,1,3,5,7,9\}$

3. $\{0,1,3,5,7\}$

4. $\{1,3,5,7\}$

Q.

Specify each of the following sets in the Roster form:

The set of positive odd numbers less than $15$

Q.

Write the given set in roster form $A=\left\{\text{Odd natural number less than10}\right\}.$

Q.

Specify each of the following sets in the Roster form:

The set of all days of the week beginning with the letter $S$

Q.

If A = {set of integers between -3 and 5}, then set A written in Rooster form is

1. A = {-2, -1, 0, 1, 2, 3, 4}

2. A = {-2, -1, 0, 1, 2, 3, 4, 5}

3. A = {-3, -2, -1, 0, 1, 2, 3, 4, 5}

4. A = {-3, -2, -1, 0, 1, 2, 3, 4}

Q.

Write the given set in Roster form $A=\left\{Evennumbersdivisibleby5andlessthan20\right\}$

Q.

If A = $\{x:5x+4\le 14,x\in W\},thenA=\{1,2\}?$

1. False

2. True

Q. If A = {set of integers between -3 and 5}, then write the set A in Roster form.

Q.

The roster form of the set $\{x:x=2r+3,\text{where}r\in I\text{and}-2<r\le 1\}$.

1. $\{0,1,3,5,7,9\}$

2. $\{1,3,5,7,9\}$

3. $\{0,1,3,5,7\}$

4. $\{1,3,5\}$

Q.

The roster form of the set $\{x:x=\frac{n}{2n+1},\text{where}nϵN\text{and}n<4\}$ is ________.

1. $\{\frac{1}{3},\frac{1}{5},\frac{1}{7}\}$

2. $\{\frac{2}{3},\frac{2}{5},\frac{2}{7}\}$

3. $\{\frac{1}{3},\frac{2}{5},\frac{3}{7}\}$

4. $\{\frac{1}{2},\frac{2}{3},\frac{3}{5}\}$

Q. The roster form of the set "The set of the months in a year that ends with the letter y" is _________ .

1. {January, February}
2. {May, July}
3. {January, February, May}
4. {January, February, May, July}

Q.

Match the following

$$\begin{array}{cc}\text{Column A}& \text{Column B}\\ 1.A=\{x:xisanoddnaturalnumber\}& a.\{\frac{1}{2},\frac{1}{3},\frac{2}{3},\frac{3}{4},\frac{3}{5},\frac{5}{7}\}\\ 2.B=\{x:x=(n^2),n\in Nandx<100\}& b.\{1,4,9,16,25,........10000\}\\ 3.C=\{x:x=\frac{n}{n+2},wherenisanaturalnumberand1\le n\le 6\}& c.\{1,4,9,16,25,36,49,64,81\}\\ 4.D=\{x:xisaletterofthewordTRIGONOMETRY\}& d.\{g,e,i,m,n,o,r,t,y\}\\ & e.\{1,3,5,7,9,...............\}\end{array}$$

1. 1 - c, 2 - b, 3 - a, 4 - d

2. 1 - c, 2 - b, 3 - d, 4 - e

3. 1 - e, 2 - b, 3 - a, 4 - d

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

Q.

Write the roster form for the given set:

“Set of all months in a year.”

Q.

Specify each of the following sets in the Roster form:

The set of last three months of the year.

Q.

4. Write the following sets in roster form :

(iii) months of year whose names begin with a vowel

Q. Match the sets in the roster form with the description given.

1. {2, 4, 6, 8}
2. {1, 2, 3, 4, 6, 12}
3. {2, 3, 5, 7}
4. {2, 3}

Q.

5. Write the following sets in tabular form :

(iii) $\left\{x:xisamonthofayearhavinglessthan31days\right\}$