Is 1105 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 1105 is composite or not first we have to find its factors.
Contents
Factors of 1105:
- If we have taken numbers from 1, 2, 3…for checking factors of 1105, we found that 1105 has factors 1, 5, 13, 17, 65, 85, 221 and 1105. Hence, we must say that 1105 is a composite number.
- Thus, 1105 is the composite number.
- If we multiply 1105 by 1, 2, 3 then we get the multiples of 1105 which are 1105, 2210 and so on.
1105 is a Composite number or Prime number
About the number 1105:
- 1105 has more than two factors which are 1, 5, 13, 17, 65, 85, 221 and 1105 and hence it is the composite number.
- 1105 is the odd composite number and it is not the perfect square also.
- If we divide 1105 by 1, 5, 13, 17, 65, 85, 221 and 1105 then we get remainder as zero. Hence, 1, 5, 13, 17, 65, 85, 221 and 1105 are the factors of 1105
Note:
- 1105 is not the perfect square.
- Factors of 1105: 1, 5, 13, 17, 65, 85, 221 and 1105
- Prime factors of 1105: 5, 13, 17
Conclusion:
- 1105 is the composite number which has factors 1, 5, 13, 17, 65, 85, 221 and 1105.
- And hence, 1105 is not the prime number.
Multiple Choice Questions:
1) 1105 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 1105 are
a) 1
b) 5, 13, 17
c) 1, 65, 85, 221 and 1105
d) 1, 5, 13, 17, 65, 85, 221 and 1105
Ans: b) 5, 13, 17
3) 1105 is the odd composite number because
a) It has factors 1, 5, 13, 17, 65, 85, 221 and 1105
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c