Is 2085 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 2085 is composite or not first we have to find its factors.
Contents
Factors of 2085:
- If we have taken numbers from 1, 2, 3…for checking factors of 2085, we found that 2085 has factors 1, 3, 5, 15, 139, 417, 695 and 2085. Hence, we must say that 2085 is a composite number.
- Thus, 2085 is the composite number.
- If we multiply 2085 by 1, 2, 3 then we get the multiples of 2085 which are 2085, 4170 and so on.
2085 is a Composite number or Prime number
About the number 2085:
- 2085 has more than two factors which are 1, 3, 5, 15, 139, 417, 695 and 2085 and hence it is the composite number.
- 2085 is the odd composite number and it is not the perfect square also.
- If we divide 2085 by 1, 3, 5, 15, 139, 417, 695 and 2085 then we get remainder as zero. Hence, 1, 3, 5, 15, 139, 417, 695 and 2085 are the factors of 2085
Note:
- 2085 is not the perfect square.
- Factors of 2085: 1, 3, 5, 15, 139, 417, 695 and 2085
- Prime factors of 2085: 3, 5, 139
Conclusion:
- 2085 is the composite number which has factors 1, 3, 5, 15, 139, 417, 695 and 2085.
- And hence, 2085 is not the prime number.
Multiple Choice Questions:
1) 2085 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 2085 are
a) 1
b) 3, 5, 139
c) 1, 15, 417, 695 and 2085
d) 1, 3, 5, 15, 139, 417, 695 and 2085
Ans: b) 3, 5, 139
3) 2085 is the composite number because
a) It has factors 1, 3, 5, 15, 139, 417, 695 and 2085
b) It has more than two factors
c) It is not divisible by 2
d) Both a and b
Ans: d) both a and b