Is 555 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 555 is composite or not first we have to find its factors.
Contents
Factors of 555:
- If we have taken numbers from 1, 2, 3…for checking factors of 555, we found that 555 has factors 1, 3, 5, 15, 37, 111, 185 and 555. Hence, we must say that 555 is a composite number.
- Thus, 555 is the composite number.
- If we multiply 555 by 1, 2, 3 then we get the multiples of 555 which are 555, 1110 and so on.
555 is a Composite number or Prime number
About the number 555:
- 555 has more than two factors which are 1, 3, 5, 15, 37, 111, 185 and 555 and hence it is the composite number.
- 555 is the odd composite number and it is not the perfect square also.
- If we divide 555 by 1, 3, 5, 15, 37, 111, 185 and 555 then we get remainder as zero. Hence, 1, 3, 5, 15, 37, 111, 185 and 555 are the factors of 555.
Note:
- 555 is not the perfect square.
- Factors of 555: 1, 3, 5, 15, 37, 111, 185 and 555
- Prime factors of 555: 3, 5, 37
Conclusion:
- 555 is the composite number which has factors 1, 3, 5, 15, 37, 111, 185 and 555.
- And hence, 555 is not the prime number.
Multiple Choice Questions:
1) 555 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 555 are
a) 1
b) 3, 5, 37
c) 1, 15, 111, 185 and 555
d) 1, 3, 5, 15, 37, 111, 185 and 555
Ans: b) 3, 5, 37
3) 555 is the odd composite number because
a) It has factors 1, 3, 5, 15, 37, 111, 185 and 555
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c