Is 513 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 513 is composite or not first we have to find its factors.
Contents
Factors of 513:
- If we have taken numbers from 1, 2, 3…for checking factors of 513, we found that 513 has factors 1, 3, 9, 19, 27, 57, 171 and 513. Hence, we must say that 513 is a composite number.
- Thus, 513 is the composite number.
- If we multiply 513 by 1, 2, 3 then we get the multiples of 513 which are 513, 1026 and so on.
513 is a Composite number or Prime number
About the number 513:
- 513 has more than two factors which are 1, 3, 9, 19, 27, 57, 171 and 513 and hence it is the composite number.
- 513 is the odd composite number and it is not the perfect square also.
- If we divide 513 by 1, 3, 9, 19, 27, 57, 171 and 513 then we get remainder as zero. Hence, 1, 3, 9, 19, 27, 57, 171 and 513 are the factors of 513.
Note:
- 513 is not the perfect square.
- Factors of 513: 1, 3, 9, 19, 27, 57, 171 and 513
- Prime factors of 513: 3, 19
Conclusion:
- 513 is the composite number which has factors 1, 3, 9, 19, 27, 57, 171 and 513.
- And hence, 513 is not the prime number.
Multiple Choice Questions:
1) 513 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 513 are
a) 1
b) 3, 19
c) 1, 9, 27, 57, 171 and 513
d) 1, 3, 9, 19, 27, 57, 171 and 513
Ans: b) 3, 19
3) 513 is the odd composite number because
a) It has factors 1, 3, 9, 19, 27, 57, 171 and 513
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c