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18 questions · timed · auto-graded

MCQ 11 Mark
If $A=\{1,2,3\}$ and $B=\{4,5,6\}$, then $A$ and $B$ are
  • A
    equal
  • equivalent
  • C
    empty
  • D
    none of these
Answer
Correct option: B.
equivalent
B
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MCQ 21 Mark
Which of the following is an infinite set?
  • A
    $\{x: x \in N, x < 500\}$
  • $\{x: x \in N, x > 500\}$
  • C
    $\{x: x \in N, 50 < x < 500\}$
  • D
    $\{x: x \in I,-5000 < x < 5000 \}$
Answer
Correct option: B.
$\{x: x \in N, x > 500\}$
B
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MCQ 31 Mark
Which of the following is a finite set?
  • A
    $\{x: x \in I, x<3\}$
  • B
    $\{x: x \in N, x>50\}$
  • C
    $\{x: x \in I, x>-10\}$
  • $\{x: x \in N, 1< x < 50\}$
Answer
Correct option: D.
$\{x: x \in N, 1< x < 50\}$
D
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MCQ 41 Mark
Which of the following is an empty set?
  • A
    $\{x: x \in W, x+2=2\}$
  • B
    $\{x: x$ is a prime number, $x<3\}$
  • C
    $\{x: x \in N, x+5=3\}$
  • $\{x: x \in N, x+8=8\}$
Answer
Correct option: D.
$\{x: x \in N, x+8=8\}$
D
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MCQ 61 Mark
A set having only one element is called
  • A
    an infinite set
  • B
    an empty set
  • a singleton set
  • D
    none of these
Answer
Correct option: C.
a singleton set
C
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MCQ 91 Mark
If $A=\left\{x: x \in N\right.$, and $\left.x^2<30\right\}$, then $n(A)=$ ?
  • A
    7
  • B
    6
  • 5
  • D
    4
Answer
Correct option: C.
5
C
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MCQ 101 Mark
$A$ set is a
  • A
    collection of similar objects
  • B
    collection of different objects
  • C
    collection of same type of objects
  • well defined collection of objects
Answer
Correct option: D.
well defined collection of objects
D
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MCQ 111 Mark
Which of the following sets is finite?
  • A
    $\{x \mid x>0, x \in N\}$
  • $\left\{x \mid x^2 < 100, x \in N\right\}$
  • C
    $\{x \mid x$ is a prime number$\}$.
  • D
    $\{x \mid x \geq 0, x \in Z \}$
Answer
Correct option: B.
$\left\{x \mid x^2 < 100, x \in N\right\}$
B
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MCQ 121 Mark
Two sets are defined as A = [1, 2, 3] and B = [3, 2, 1] What can be concluded?
  • A
    $A \neq B$, because their orders are different
  • $A = B$, because they contain the same elements
  • C
    A is a subset of B, but B is not a subset of A.
  • D
    A and B are finite but not equal sets.
Answer
Correct option: B.
$A = B$, because they contain the same elements
B
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MCQ 131 Mark
Two sets are defined as
$A=\{x \mid x$ is even prime numbers less than 100$\}$
$B=\{x \mid x$ is an odd composite number less than 100$\}$
Which of the following numbers is common in both?
  • A
    29
  • B
    53
  • C
    97
  • none of these
Answer
Correct option: D.
none of these
D
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MCQ 141 Mark
If $A=\{x: x \in N$ and $x$ is an odd prime number less than 17$\}$, then the cardinal number of $A$ is:
  • A
    8
  • 6
  • C
    5
  • D
    none of these
Answer
Correct option: B.
6
B
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MCQ 151 Mark
Which of the following sets is an empty set?
  • $\{x \mid x$ is a positive integer and $x<0\}$
  • B
    $\left\{x \mid x^2=4, x \in Z \right\}$
  • C
    $\{x \mid x$ is a letter in the word "apple"$\}$
  • D
    $\{x \mid x$ is a natural number and $x$ is odd$\}$
Answer
Correct option: A.
$\{x \mid x$ is a positive integer and $x<0\}$
A
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MCQ 161 Mark
Which of the following is a singleton set?
  • A
    $\left\{x \mid x^2=9, x \in Z \right\}$
  • $\{x \mid x$ is a prime number and $x$ is even$\}$
  • C
    $\{x \mid x=7-7, x \in N\}$
  • D
    $\{x \mid x$ is a vowel in the word "prime"$\}$
Answer
Correct option: B.
$\{x \mid x$ is a prime number and $x$ is even$\}$
B
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MCQ 171 Mark
Assertion (A) : If A = $\{1,2,3,4,5,6\}$ and B = $\{a, b, c, d, e, f\}$, then A and B are equivalent sets.
Reason (R) : Two sets A and B are said to be equivalent if every element of A is in B and every element of B is in A.
  • A
    Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  • B
    Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
  • Assertion (A) is true but Reason (R) is false.
  • D
    Assertion (A) is false but Reason (R) is true.
Answer
Correct option: C.
Assertion (A) is true but Reason (R) is false.
C
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MCQ 181 Mark
Assertion (A) : The set of all prime numbers less than 30 is
[2, 3, 5, 7, 11, 13, 17, 19, 23, 29)
Reason (R) : Every repeated element in a set is taken only once.
  • A
    Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  • Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
  • C
    Assertion (A) is true but Reason (R) is false.
  • D
    Assertion (A) is false but Reason (R) is true.
Answer
Correct option: B.
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
B
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MCQ - MATHS STD 6 Questions - Vidyadip