Is 1909 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 1909 is composite or not first we have to find its factors.
Contents
Factors of 1909:
- If we have taken numbers from 1, 2, 3…for checking factors of 1909, we found that 1909 has factors 1, 23, 83 and 1909. Hence, we must say that 1909 is a composite number.
- Thus, 1909 is the composite number.
- If we multiply 1909 by 1, 2, 3 then we get the multiples of 1909 which are 1909, 3818 and so on.
1909 is a Composite number or Prime number
About the number 1909:
- 1909 has more than two factors which are 1, 23, 83 and 1909 and hence it is the composite number.
- 1909 is the odd composite number and it is not the perfect square also.
- If we divide 1909 by 1, 23, 83 and 1909 then we get remainder as zero. Hence, 1, 23, 83 and 1909 are the factors of 1909
Note:
- 1909 is not the perfect square.
- Factors of 1909: 1, 23, 83 and 1909
- Prime factors of 1909: 23, 83
Conclusion:
- 1909 is the composite number which has factors 1, 23, 83 and 1909.
- And hence, 1909 is not the prime number.
Multiple Choice Questions:
1) 1909 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 1909 are
a) 1
b) 23, 83
c) 1 and 1909
d) 1, 23, 83 and 1909
Ans: b) 1 and 1909
3) 1909 is the odd composite number because
a) It has factors 1, 23, 83 and 1909
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all