Questions · Page 3 of 3

[1 Mark Question Answer]

Question 1011 Mark
Write the set in Roster form and write the cardinal number of : $E =\{x: x=2 n-1, n \in N$ and $n<6\}$.
Answer
$E =\{1,3,5,7,9\}, n( E )=5$
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Question 1021 Mark
Write the set in Roster form and write the cardinal number of : $J =\left\{x: x=\frac{1}{n}, n \in N, 4 < n < 10\right\}$.
Answer
$J =\left\{\frac{1}{5}, \frac{1}{6}, \frac{1}{7}, \frac{1}{8}, \frac{1}{9}\right\}, n(J)=5$
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Question 1031 Mark
Write the set in Roster form and write the cardinal number of : $D =\{x: x \in W, x-3<2\}$.
Answer
$D =\{0,1,2,3,4\}, n( D )=5$
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Question 1041 Mark
Write the set in Roster form and write the cardinal number of : $C =\left\{x: x=n^2, n \in N, 10
Answer
$C =\{121,144,169,196,225\}, n( C )=5$
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Question 1051 Mark
Write the set in Roster form and write the cardinal number of : $B =\{x: x \in N, 3 x-6<9\}$.
Answer
$B =\{1,2,3,4\}, n(B)=4$
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Question 1061 Mark
Write the set in Roster form and write the cardinal number of :$\mathrm{A}=\{x: x$ is an integer, $-3 < x \leq 4\}$.
Answer
$A =\{-2,-1,0,1,2,3,4\}, n(A)=7$
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Question 1071 Mark
Write each of the following sets in Roster form :G = set of vowels in the word, 'INTERMEDIATE'.
Answer
$G =\{ I , E , A \}$
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Question 1081 Mark
Write the set in Roster form : F = set of consonants in the word, 'SECONDARY.
Answer
$F =\{ S , C , N , D , R , Y \}$
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Question 1091 Mark
Write the set in Roster form : E = set of letters in the word, 'MATHEMATICS'.
Answer
$E =\{ M , A , T , H , E , I , C , S \}$
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Question 1101 Mark
Write the set in Roster form : D = set of all composite numbers between 23 and 33.
Answer
$D =\{24,25,26,27,28,30,32\}$
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[1 Mark Question Answer] - Page 3 - MATHS STD 7 Questions - Vidyadip