Is 1585 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 1585 is composite or not first we have to find its factors.
Contents
Factors of 1585:
- If we have taken numbers from 1, 2, 3…for checking factors of 1585, we found that 1585 has factors 1, 5, 317 and 1585. Hence, we must say that 1585 is a composite number.
- Thus, 1585 is the composite number.
- If we multiply 1585 by 1, 2, 3 then we get the multiples of 1585 which are 1585, 3170 and so on.
1585 is a Composite number or Prime number
About the number 1585:
- 1585 has more than two factors which are 1, 5, 317 and 1585 and hence it is the composite number.
- 1585 is the odd composite number and it is not the perfect square also.
- If we divide 1585 by 1, 5, 317 and 1585 then we get remainder as zero. Hence, 1, 5, 317 and 1585 are the factors of 1585
Note:
- 1585 is not the perfect square.
- Factors of 1585: 1, 5, 317 and 1585
- Prime factors of 1585: 5, 317
Conclusion:
- 1585 is the composite number which has factors 1, 5, 317 and 1585.
- And hence, 1585 is not the prime number.
Multiple Choice Questions:
1) 1585 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1585 are
a) 1
b) 5, 317
c) 1 and 1585
d) 1, 5, 317 and 1585
Ans: b) 1 and 1585
3) 1585 is the odd composite number because
a) It has factors 1, 5, 317 and 1585
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all