Is 3891 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 3891 is composite or not first we have to find its factors.
Contents
Factors of 3891:
- If we have taken numbers from 1, 2, 3…for checking factors of 3891, we found that 3891 has factors 1, 3, 1297 and 3891. Hence, we must say that 3891 is a composite number.
- Thus, 3891 is the composite number.
- If we multiply 3891 by 1, 2, 3 then we get the multiples of 3891 which are 3891, 7782 and so on.
3891 is a Composite number or Prime number
About the number 3891:
- 3891 has more than two factors which are 1, 3, 1297 and 3891 and hence it is the composite number.
- 3891 is the odd composite number and it is not the perfect square also.
- If we divide 3891 by 1, 3, 1297 and 3891 then we get remainder as zero. Hence 1, 3, 1297 and 3891 are the factors of 3891
Note:
- 3891 is not the perfect square.
- Factors of 3891:1, 3, 1297 and 3891
- Prime factors of 3891: 3, 1297
Conclusion:
- 3891 is the composite number which has factors 1, 3, 1297 and 3891.
- And hence, 3891 is not the prime number.
Multiple Choice Questions:
1) 3891 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 3891 are
a) 1
b) 3, 1297
c) 1, 3, 1297 and 3891
d) 1 and 3891
Ans: d) 1 and 3891
3) 3891 is the odd composite number because
a) It has factors 1, 3, 1297 and 3891
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all
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