Is 1209 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 1209 is composite or not first we have to find its factors.
Contents
Factors of 1209:
- If we have taken numbers from 1, 2, 3…for checking factors of 1209, we found that 1209 has factors 1, 3, 13, 31, 39, 93, 403 and 1209. Hence, we must say that 1209 is a composite number.
- Thus, 1209 is the composite number.
- If we multiply 1209 by 1, 2, 3 then we get the multiples of 1209 which are 1209, 2418 and so on.
1209 is a Composite number or Prime number
About the number 1209:
- 1209 has more than two factors which are 1, 3, 13, 31, 39, 93, 403 and 1209 and hence it is the composite number.
- 1209 is the odd composite number and it is not the perfect square also.
- If we divide 1209 by 1, 3, 13, 31, 39, 93, 403 and 1209 then we get remainder as zero. Hence, 1, 3, 13, 31, 39, 93, 403 and 1209 are the factors of 1209
Note:
- 1209 is not the perfect square.
- Factors of 1209: 1, 3, 13, 31, 39, 93, 403 and 1209
- Prime factors of 1209: 3, 13, 31
Conclusion:
- 1209 is the composite number which has factors 1, 3, 13, 31, 39, 93, 403 and 1209.
- And hence, 1209 is not the prime number.
Multiple Choice Questions:
1) 1209 is a
a) odd number
b) Prime number
c) Composite number
d) Both a and c
Ans: d) both a and c
2) The prime factors of a composite number 1209 are
a) 1
b) 3, 13, 31
c) 1, 39, 93, 403 and 1209
d) 1, 3, 13, 31, 39, 93, 403 and 1209
Ans: b) 3, 13, 31
3) 1209 is the odd composite number because
a) It has factors 1, 3, 13, 31, 39, 93, 403 and 1209
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c