Is 1681 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 1681 is composite or not first we have to find its factors.
Contents
Factors of 1681:
- If we have taken numbers from 1, 2, 3…for checking factors of 1681, we found that 1681 has factors 1, 41 and 1681. Hence, we must say that 1681 is a composite number.
- Thus, 1681 is the composite number.
- If we multiply 1681 by 1, 2, 3 then we get the multiples of 1681 which are 1681, 3362 and so on.
1681 is a Composite number or Prime number
About the number 1681:
- 1681 has more than two factors which are 1, 41 and 1681 and hence it is the composite number.
- 1681 is the odd composite number and it is the perfect square also.
- If we divide 1681 by 1, 41 and 1681 then we get remainder as zero. Hence, 1, 41 and 1681 are the factors of 1681
Note:
- 1681 is the perfect square.
- Factors of 1681: 1, 41 and 1681
- Prime factors of 1681: 41
Conclusion:
- 1681 is the composite number which has factors 1, 41 and 1681.
- And hence, 1681 is not the prime number.
Multiple Choice Questions:
1) 1681 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 1681 are
a) 1
b) 41
c) 1 and 1681
d) 1, 41 and 1681
Ans: b) 1 and 1681
3) 1681 is the odd composite number because
a) It has factors 1, 41 and 1681
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all