Is 1857 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 1857 is composite or not first we have to find its factors.
Contents
Factors of 1857:
- If we have taken numbers from 1, 2, 3…for checking factors of 1857, we found that 1857 has factors 1, 3, 619 and 1857. Hence, we must say that 1857 is a composite number.
- Thus, 1857 is the composite number.
- If we multiply 1857 by 1, 2, 3 then we get the multiples of 1857 which are 1857, 3714 and so on.
1857 is a Composite number or Prime number
About the number 1857:
- 1857 has more than two factors which are 1, 3, 619 and 1857 and hence it is the composite number.
- 1857 is the odd composite number and it is not the perfect square also.
- If we divide 1857 by 1, 3, 619 and 1857 then we get remainder as zero. Hence, 1, 3, 619 and 1857 are the factors of 1857
Note:
- 1857 is not the perfect square.
- Factors of 1857: 1, 3, 619 and 1857
- Prime factors of 1857: 3, 619
Conclusion:
- 1857 is the composite number which has factors 1, 3, 619 and 1857.
- And hence, 1857 is not the prime number.
Multiple Choice Questions:
1) 1857 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1857 are
a) 1
b) 3, 619
c) 1 and 1857
d) 1, 3, 619 and 1857
Ans: b) 1 and 1857
3) 1857 is the odd composite number because
a) It has factors 1, 3, 619 and 1857
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all