Is 1045 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 1045 is composite or not first we have to find its factors.
Contents
Factors of 1045:
- If we have taken numbers from 1, 2, 3…for checking factors of 1045, we found that 1045 has factors 1, 5, 11, 19, 55, 95, 209 and 1045. Hence, we must say that 1045 is a composite number.
- Thus, 1045 is the composite number.
- If we multiply 1045 by 1, 2, 3 then we get the multiples of 1045 which are 1045, 2090 and so on.
1045 is a Composite number or Prime number
About the number 1045:
- 1045 has more than two factors which are 1, 5, 11, 19, 55, 95, 209 and 1045 and hence it is the composite number.
- 1045 is the odd composite number and it is not the perfect square also.
- If we divide 1045 by 1, 5, 11, 19, 55, 95, 209 and 1045 then we get remainder as zero. Hence, 1, 5, 11, 19, 55, 95, 209 and 1045 are the factors of 1045
Note:
- 1045 is not the perfect square.
- Factors of 1045: 1, 5, 11, 19, 55, 95, 209 and 1045
- Prime factors of 1045: 5, 11, 19
Conclusion:
- 1045 is the composite number which has factors 1, 5, 11, 19, 55, 95, 209 and 1045.
- And hence, 1045 is not the prime number.
Multiple Choice Questions:
1) 1045 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 1045 are
a) 1
b) 5, 11, 19
c) 1, 55, 95, 209 and 1045
d) 1, 5, 11, 19, 55, 95, 209 and 1045
Ans: b) 5, 11, 19
3) 1045 is the odd composite number because
a) It has factors 1, 5, 11, 19, 55, 95, 209 and 1045
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c