Is 1685 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 1685 is composite or not first we have to find its factors.
Contents
Factors of 1685:
- If we have taken numbers from 1, 2, 3…for checking factors of 1685, we found that 1685 has factors 1, 5, 337 and 1685. Hence, we must say that 1685 is a composite number.
- Thus, 1685 is the composite number.
- If we multiply 1685 by 1, 2, 3 then we get the multiples of 1685 which are 1685, 3370 and so on.
1685 is a Composite number or Prime number
About the number 1685:
- 1685 has more than two factors which are 1, 5, 337 and 1685 and hence it is the composite number.
- 1685 is the odd composite number and it is not the perfect square also.
- If we divide 1685 by 1, 5, 337 and 1685 then we get remainder as zero. Hence, 1, 5, 337 and 1685 are the factors of 1685
Note:
- 1685 is not the perfect square.
- Factors of 1685: 1, 5, 337 and 1685
- Prime factors of 1685: 5, 337
Conclusion:
- 1685 is the composite number which has factors 1, 5, 337 and 1685.
- And hence, 1685 is not the prime number.
Multiple Choice Questions:
1) 1685 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 1685 are
a) 1
b) 5, 337
c) 1 and 1685
d) 1, 5, 337 and 1685
Ans: b) 1 and 1685
3) 1685 is the odd composite number because
a) It has factors 1, 5, 337 and 1685
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all