Is 4085 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 4085 is composite or not first we have to find its factors.
Contents
Factors of 4085:
- If we have taken numbers from 1, 2, 3…for checking factors of 4085, we found that 4085 has factors 1, 5, 19, 43, 95, 215, 817 and 4085. Hence, we must say that 4085 is a composite number.
- Thus, 4085 is the composite number.
- If we multiply 4085 by 1, 2, 3 then we get the multiples of 4085 which are 4085, 8170 and so on.
4085 is a Composite number or Prime number
About the number 4085:
- 4085 has more than two factors which are 1, 5, 19, 43, 95, 215, 817 and 4085 and hence it is the composite number.
- 4085 is the odd composite number and it is not the perfect square also.
- If we divide 4085 by 1, 5, 19, 43, 95, 215, 817 and 4085 then we get remainder as zero. Hence 1, 5, 19, 43, 95, 215, 817 and 4085 are the factors of 4085
Note:
- 4085 is not the perfect square.
- Factors of 4085:1, 5, 19, 43, 95, 215, 817 and 4085
- Prime factors of 4085: 5, 19, 43
Conclusion:
- 4085 is the composite number which has factors 1, 5, 19, 43, 95, 215, 817 and 4085.
- And hence, 4085 is not the prime number.
Multiple Choice Questions:
1) 4085 is a
a) odd number
b) Prime number
c) even number
d) Both a and c
Ans: a) odd number
2) The non-prime factors of a composite number 4085 are
a) 1
b) 5, 19, 43
c) 1, 5, 19, 43, 95, 215, 817 and 4085
d) 1, 95, 215, 817 and 4085
Ans: d)1, 95, 215, 817 and 4085
3) 4085 is the odd composite number because
a) It has factors 1, 5, 19, 43, 95, 215, 817 and 4085
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all
Why the below numbers are composite numbers
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