Is 115 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 115 is composite or not first we have to find its factors.
Contents
Factors of 115:
- If we have taken numbers from 1, 2, 3…for checking factors of 115, we found that 115 has factors 1, 5, 23 and 115. Hence, we must say that 115 is a composite number.
- Thus, 115 is the composite number.
- If we multiply 115 by 1, 2, 3 then we get the multiples of 115 which are 115, 230, and so on.
About the number 115:
- 115 has more than two factors which are 1,5, 23 and 115 and hence it is the composite number.
- 115 is the odd composite number and it is not the perfect square also.
- If we divide 115 by 1,2, 5, 23 and 115 then we get remainder as zero. Hence, 1, 5, 23 and 115 are the factors of 115.
Note:
- 115 is not the perfect square.
- Factors of 115: 1, 5, 23 and 115
- Prime factors of 115: 5, 23
Conclusion:
- 115 is the composite number which has factors 1, 5, 23 and 115.
- And hence, 115 is not the prime number.
Multiple Choice Questions:
1) 115 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 115 are
a) 1
b) 5, 23
c) Both a and b
d) 1151
Ans: b) 5, 23
3) 1 is the not prime factor of 115 because
a) It is the prime number
b) 1 is neither prime nor composite number
c) Both a and b
d) Given statement is false
Ans: b) 1 is neither prime nor composite number