Is 305 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 305 is composite or not first we have to find its factors.
Contents
Factors of 305:
- If we have taken numbers from 1, 2, 3…for checking factors of 305, we found that 305 has factors 1, 5, 61 and 305. Hence, we must say that 305 is a composite number.
- Thus, 305 is the composite number.
- If we multiply 305 by 1, 2, 3 then we get the multiples of 305 which are 305, 610 and so on.
305 is a Composite number or Prime number
About the number 305:
- 305 has more than two factors which are 1, 5, 61 and 305 and hence it is the composite number.
- 305 is the odd composite number and it is not the perfect square also.
- If we divide 305 by 1, 5, 61 and 305 then we get remainder as zero. Hence, 1, 5, 61 and 305 are the factors of 305.
Note:
- 305 is not the perfect square.
- Factors of 305: 1, 5, 61 and 305
- Prime factors of 305: 5, 61
Conclusion:
- 305 is the composite number which has factors 1, 5, 61 and 305.
- And hence, 305 is not the prime number.
Multiple Choice Questions:
1) 305 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 305 are
a) 1
b) 5, 61
c) 1 and 305
d) 1, 5, 61 and 305
Ans: b) 5, 61
3) 305 is the odd composite number because
a) It has factors 1, 5, 61 and 305
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c