Is 520 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 520 is composite or not first we have to find its factors.
Contents
Factors of 520:
- If we have taken numbers from 1, 2, 3…for checking factors of 520, we found that 520 has factors 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260 and 520. Hence, we must say that 520 is a composite number.
- Thus, 520 is the composite umber.
- If we multiply 520 by 1, 2, 3 then we get the multiples of 520 which are 520, 1040 and so on.
About the number 520:
- 520 has more than two factors which are 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260 and 520 and hence it is the composite number.
- 520 is the even composite number and it is not the perfect square also.
- If we divide 520 by 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260 and 520 then we get remainder as zero. Hence, 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260 and 520 are the factors of 520.
Note:
- 520 is not the perfect square.
- Factors of 520: 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260 and 520
- Prime factors of 520: 2, 5, 13
Conclusion:
- 520 is the composite number which has factors 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260 and 520
- And hence, 520 is not the prime number.
Multiple Choice Questions:
1) 520 is a
a) Prime number
b) odd number
c)n Composite number
d) Both b and c
Ans: c) composite number
2) The non-prime factors of a composite number 520 are
a) 1
b) 2, 5, 13
c) 1, 4, 5, 8, 10, 20, 26, 40, 52, 65, 104, 130, 260 and 520
d) 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260 and 520
Ans: c) 1,4, 8, 10, 20, 26, 40, 52, 65, 104, 130, 260 and 520
3) 520 is the composite number because
a) It has two factors
b) More than two factors
c) Divisible by 2
d) Both b and c
Ans: b) more than two factors