Is 1085 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 1085 is composite or not first we have to find its factors.
Contents
Factors of 1085:
- If we have taken numbers from 1, 2, 3…for checking factors of 1085, we found that 1085 has factors 1, 5, 7, 31, 35, 155, 217 and 1085. Hence, we must say that 1085 is a composite number.
- Thus, 1085 is the composite number.
- If we multiply 1085 by 1, 2, 3 then we get the multiples of 1085 which are 1085, 2170 and so on.
1085 is a Composite number or Prime number
About the number 1085:
- 1085 has more than two factors which are 1, 5, 7, 31, 35, 155, 217 and 1085 and hence it is the composite number.
- 1085 is the odd composite number and it is not the perfect square also.
- If we divide 1085 by 1, 5, 7, 31, 35, 155, 217 and 1085 then we get remainder as zero. Hence, 1, 5, 7, 31, 35, 155, 217 and 1085 are the factors of 1085
Note:
- 1085 is not the perfect square.
- Factors of 1085: 1, 5, 7, 31, 35, 155, 217 and 1085
- Prime factors of 1085: 5, 7, 31
Conclusion:
- 1085 is the composite number which has factors 1, 5, 7, 31, 35, 155, 217 and 1085.
- And hence, 1085 is not the prime number.
Multiple Choice Questions:
1) 1085 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 1085 are
a) 1
b) 5, 7, 31
c) 1, 35, 155, 217 and 1085
d) 1, 5, 7, 31, 35, 155, 217 and 1085
Ans: b) 5, 7, 31
3) 1085 is the odd composite number because
a) It has factors 1, 5, 7, 31, 35, 155, 217 and 1085
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c