Is 1455 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 1455 is composite or not first we have to find its factors.
Contents
Factors of 1455:
- If we have taken numbers from 1, 2, 3…for checking factors of 1455, we found that 1455 has factors 1, 3, 5, 15, 97, 291, 485 and 1455. Hence, we must say that 1455 is a composite number.
- Thus, 1455 is the composite number.
- If we multiply 1455 by 1, 2, 3 then we get the multiples of 1455 which are 1455, 2910 and so on.
1455 is a Composite number or Prime number
About the number 1455:
- 1455 has more than two factors which are 1, 3, 5, 15, 97, 291, 485 and 1455 and hence it is the composite number.
- 1455 is the odd composite number and it is not the perfect square also.
- If we divide 1455 by 1, 3, 5, 15, 97, 291, 485 and 1455 then we get remainder as zero. Hence, 1, 3, 5, 15, 97, 291, 485 and 1455 are the factors of 1455
Note:
- 1455 is not the perfect square.
- Factors of 1455: 1, 3, 5, 15, 97, 291, 485 and 1455
- Prime factors of 1455: 3, 5, 97
Conclusion:
- 1455 is the composite number which has factors 1, 3, 5, 15, 97, 291, 485 and 1455.
- And hence, 1455 is not the prime number.
Multiple Choice Questions:
1) 1455 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1455 are
a) 1
b) 3, 5, 97
c) 1, 15, 291, 485 and 1455
d) 1, 3, 5, 15, 97, 291, 485 and 1455
Ans: b) 1, 15, 291, 485 and 1455
3) 1455 is the odd composite number because
a) It has factors 1, 3, 5, 15, 97, 291, 485 and 1455
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all