Is 2921 is a composite number or not ?
- As we already know that, the number having factors 1 and the number itself is the prime number.
- And numbers having more than these two factors are the composite numbers.
- To check whether the number 2921 is composite or not first we have to find its factors.
Contents
Factors of 2921:
- If we have taken numbers from 1, 2, 3…for checking factors of 2921, we found that 2921 has factors 1, 23, 127 and 2921. Hence, we must say that 2921 is a composite number.
- Thus, 2921 is the composite number.
- If we multiply 2921 by 1, 2, 3 then we get the multiples of 2921 which are 2921, 5842 and so on.
2921 is a Composite number or Prime number
About the number 2921:
- 2921 has more than two factors which are 1, 23, 127 and 2921 and hence it is the composite number.
- 2921 is the odd composite number and it is not the perfect square also.
- If we divide 2921 by 1, 23, 127 and 2921 then we get remainder as zero. Hence 1, 23, 127 and 2921 are the factors of 2921
Note:
- 2921 is not the perfect square.
- Factors of 2921: 1, 23, 127 and 2921
- Prime factors of 2921: 23, 127
Conclusion:
- 2921 is the composite number which has factors 1, 23, 127 and 2921.
- And hence, 2921 is not the prime number.
Multiple Choice Questions:
1) 2921 is a
a) odd number
b) Prime number
c) even number
d) Both a and c
Ans: a) odd number
2) The non-prime factors of a composite number 2921 are
a) 1
b) 23, 127
c) 1, 23, 127 and 2921
d) 1 and 2921
Ans: d) 1 and 2921
3) 2921 is the odd composite number because
a) It has factors 1, 23, 127 and 2921
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all