Is 915 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 915 is composite or not first we have to find its factors.
Contents
Factors of 915:
- If we have taken numbers from 1, 2, 3…for checking factors of 915, we found that 915 has factors 1, 3, 5, 15, 61, 183, 305 and 915. Hence, we must say that 915 is a composite number.
- Thus, 915 is the composite number.
- If we multiply 915 by 1, 2, 3 then we get the multiples of 915 which are 915, 1830 and so on.
915 is a Composite number or Prime number
About the number 915:
- 915 has more than two factors which are 1, 3, 5, 15, 61, 183, 305 and 915 and hence it is the composite number.
- 915 is the odd composite number and it is not the perfect square also.
- If we divide 915 by 1, 3, 5, 15, 61, 183, 305 and 915 then we get remainder as zero. Hence, 1, 3, 5, 15, 61, 183, 305 and 915 are the factors of 915
Note:
- 915 is not the perfect square.
- Factors of 915: 1, 3, 5, 15, 61, 183, 305 and 915
- Prime factors of 915: 3, 5, 61
Conclusion:
- 915 is the composite number which has factors 1, 3, 5, 15, 61, 183, 305 and 915.
- And hence, 915 is not the prime number.
Multiple Choice Questions:
1) 915 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 915 are
a) 1
b) 3, 5, 61
c) 1, 15, 183, 305 and 915
d) 1, 3, 5, 15, 61, 183, 305 and 915
Ans: b) 3, 5, 61
3) 915 is the odd composite number because
a) It has factors 1, 3, 5, 15, 61, 183, 305 and 915
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c