Is 455 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 455 is composite or not first we have to find its factors.
Contents
Factors of 455:
- If we have taken numbers from 1, 2, 3…for checking factors of 455, we found that 455 has factors 1, 5, 7, 13, 35, 65, 91 and 455. Hence, we must say that 455 is a composite number.
- Thus, 455 is the composite number.
- If we multiply 455 by 1, 2, 3 then we get the multiples of 455 which are 455, 910 and so on.
455 is a Composite number or Prime number
About the number 455:
- 455 has more than two factors which are 1, 5, 7, 13, 35, 65, 91 and 455 and hence it is the composite number.
- 455 is the odd composite number and it is not the perfect square also.
- If we divide 455 by 1, 5, 7, 13, 35, 65, 91 and 455 then we get remainder as zero. Hence, 1, 5, 7, 13, 35, 65, 91 and 455 are the factors of 455.
Note:
- 455 is not the perfect square.
- Factors of 455: 1, 5, 7, 13, 35, 65, 91 and 455
- Prime factors of 455: 5, 7, 13
Conclusion:
- 455 is the composite number which has factors 1, 5, 7, 13, 35, 65, 91 and 455.
- And hence, 455 is not the prime number.
Multiple Choice Questions:
1) 455 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 455 are
a) 1
b) 5, 7, 13
c) 1, 35, 65, 91 and 455
d) 1, 5, 7, 13, 35, 65, 91 and 455
Ans: b) 5, 7, 13
3) 455 is the odd composite number because
a) It has factors 1, 5, 7, 13, 35, 65, 91 and 455
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c