Is 2555 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 2555 is composite or not first we have to find its factors.
Contents
Factors of 2555:
- If we have taken numbers from 1, 2, 3…for checking factors of 2555, we found that 2555 has factors 1, 5, 7, 35, 73, 365, 511 and 2555. Hence, we must say that 2555 is a composite number.
- Thus, 2555 is the composite number.
- If we multiply 2555 by 1, 2, 3 then we get the multiples of 2555 which are 2555, 5110 and so on.
2555 is a Composite number or Prime number
About the number 2555:
- 2555 has more than two factors which are 1, 5, 7, 35, 73, 365, 511 and 2555 and hence it is the composite number.
- 2555 is the odd composite number and it is not the perfect square also.
- If we divide 2555 by 1, 5, 7, 35, 73, 365, 511 and 2555 then we get remainder as zero. Hence 1, 5, 7, 35, 73, 365, 511 and 2555 are the factors of 2555
Note:
- 2555 is not the perfect square.
- Factors of 2555: 1, 5, 7, 35, 73, 365, 511 and 2555
- Prime factors of 2555: 5, 7, 73
Conclusion:
- 2555 is the composite number which has factors 1, 5, 7, 35, 73, 365, 511 and 2555.
- And hence, 2555 is not the prime number.
Multiple Choice Questions:
1) 2555 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 2555 are
a) 1
b) 5, 7, 73
c) 1 and 2555
d) 1, 5, 7, 35, 73, 365, 511 and 2555
Ans: b) 5, 7, 73
3) 2555 is the composite number because
a) It has factors 1, 5, 7, 35, 73, 365, 511 and 2555
b) It has more than two factors
c) It is not divisible by 2
d) Both a and b
Ans: d) both a and b