Is 1809 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 1809 is composite or not first we have to find its factors.
Contents
Factors of 1809:
- If we have taken numbers from 1, 2, 3…for checking factors of 1809, we found that 1809 has factors 1, 3, 9, 27, 67, 201, 603 and 1809. Hence, we must say that 1809 is a composite number.
- Thus, 1809 is the composite number.
- If we multiply 1809 by 1, 2, 3 then we get the multiples of 1809 which are 1809, 3618 and so on.
1809 is a Composite number or Prime number
About the number 1809:
- 1809 has more than two factors which are 1, 3, 9, 27, 67, 201, 603 and 1809 and hence it is the composite number.
- 1809 is the odd composite number and it is not the perfect square also.
- If we divide 1809 by 1, 3, 9, 27, 67, 201, 603 and 1809 then we get remainder as zero. Hence, 1, 3, 9, 27, 67, 201, 603 and 1809 are the factors of 1809
Note:
- 1809 is not the perfect square.
- Factors of 1809: 1, 3, 9, 27, 67, 201, 603 and 1809
- Prime factors of 1809: 3, 67
Conclusion:
- 1809 is the composite number which has factors 1, 3, 9, 27, 67, 201, 603 and 1809.
- And hence, 1809 is not the prime number.
Multiple Choice Questions:
1) 1809 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 1809 are
a) 1
b) 3, 67
c) 1, 9, 27, 201, 603 and 1809
d) 1, 3, 9, 27, 67, 201, 603 and 1809
Ans: b) 1, 9, 27, 201, 603 and 1809
3) 1809 is the odd composite number because
a) It has factors 1, 3, 9, 27, 67, 201, 603 and 1809
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all