Prime Number and Composite Number Class 6 Maths MCQ Question and Answers. Important MCQ on Prime Number and Composite Number 6th Standard Mathematics Subject.
Prime Number and Composite Number Class 6 Maths MCQ
(1) The smallest odd number is
(a) 3
(b) 4
(c) 1
(d) 2
Ans: (c) 1
(2) The smallest even number is
(a) 2
(b) 1
(c) 3
(d) 4
Ans: (a) 2
(3) The smallest prime number is
(a) 3
(b) 2
(c) 1
(d) 4
Ans: (b) 2
(4) The smallest composite number is
(a) 1
(b) 2
(c) 3
(d) 4
Ans: (d) 4
(5) The greatest on digit prime number is
(a) 7
(b) 9
(c) 8
(d) 5
Ans: (a) 7
(6) The greatest on digit composite number is
(a) 5
(b) 9
(c) 2
(d) 1
Ans: (b) 9
(7) The smallest two digit number is
(a) 16
(b) 12
(c) 10
(d) 15
Ans: (c) 10
(8) The least prime number between 1 and 10 are
(a) 3
(b) 4
(c) 5
(d) 2
Ans: (d) 2
(9) The greatest prime number between 1 and 10 is
(a) 7
(b) 9
(c) 10
(d) 11
Ans: (a) 7
(10) The only even number is not a composite number is
(a) 1
(b) 2
(c) 5
(d) None
Ans: (b) 2
(11) Prime number which is even is
(a) 5
(b) 4
(c) 2
(d) 3
Ans: (c) 2
(12) A number which has only two factors the number 1 and the number itself is called.
(a) Odd number
(b) Even number
(c) Composite number
(d) Prime number
Ans: (d) Prime number
(13) A number which has more than two factors is called.
(a) Odd number
(b) Composite number
(c) Prime number
(d) Even number
Ans: (b) Composite number
(14) Two numbers which have no common factor other than 1 are called.
(a) Co-primes
(b) Primes
(c) Odd prime
(d) Even prime
Ans: (a) Co-primes
(15) Two numbers are said to be ____ is they do not have common factor other than 1.
(a) Odd
(b) Even
(c) Co-primes
(d) Prime
Ans: (c) Co-primes
(16) Which of the following number is neither prime nor a composite number.
(a) 9
(b) 7
(c) 3
(d) 1
Ans: (d) 1
(17) A set three consecutive prime number differing by ___ is called a prime triplet.
(a) 5
(b) 2
(c) 3
(d) 6
Ans: (b) 2
(18) Which of the following number is prime.
(a) 17
(b) 15
(c) 21
(d) 9
Ans: (a) 17
(19) Which of the following number is composite
(a) 23
(b) 19
(c) 21
(d) 29
Ans: (c) 21
(20) Which of the following pairs of numbers are not co-prime.
(a) 12, 21
(b) 18, 23
(c) 12, 49
(d) 7, 15
Ans: (d) 7, 15
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