Is 581 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 581 is composite or not first we have to find its factors.
Contents
Factors of 581:
- If we have taken numbers from 1, 2, 3…for checking factors of 581, we found that 581 has factors 1, 7, 83 and 581. Hence, we must say that 581 is a composite number.
- Thus, 581 is the composite number.
- If we multiply 581 by 1, 2, 3 then we get the multiples of 581 which are 581, 1162 and so on.
581 is a Composite number or Prime number
About the number 581:
- 581 has more than two factors which are 1, 7, 83 and 581 and hence it is the composite number.
- 581 is the odd composite number and it is not the perfect square also.
- If we divide 581 by 1, 7, 83 and 581 then we get remainder as zero. Hence, 1, 7, 83 and 581 are the factors of 581.
Note:
- 581 is not the perfect square.
- Factors of 581: 1, 7, 83 and 581
- Prime factors of 581: 7, 83
Conclusion:
- 581 is the composite number which has factors 1, 7, 83 and 581.
- And hence, 581 is not the prime number.
Multiple Choice Questions:
1) 581 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 581 are
a) 1
b) 7, 83
c) 1 and 581
d) 1, 7, 83 and 581
Ans: b) 7, 83
3) 581 is the odd composite number because
a) It has factors 1, 7, 83 and 581
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c