Is 605 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 605 is composite or not first we have to find its factors.
Contents
Factors of 605:
- If we have taken numbers from 1, 2, 3…for checking factors of 605, we found that 605 has factors 1, 5, 11, 55, 121 and 605. Hence, we must say that 605 is a composite number.
- Thus, 605 is the composite number.
- If we multiply 605 by 1, 2, 3 then we get the multiples of 605 which are 605, 1210 and so on.
605 is a Composite number or Prime number
About the number 605:
- 605 has more than two factors which are 1, 5, 11, 55, 121 and 605 and hence it is the composite number.
- 605 is the odd composite number and it is not the perfect square also.
- If we divide 605 by 1, 5, 11, 55, 121 and 605 then we get remainder as zero. Hence, 1, 5, 11, 55, 121 and 605 are the factors of 605.
Note:
- 605 is not the perfect square.
- Factors of 605: 1, 5, 11, 55, 121 and 605
- Prime factors of 605: 5, 11
Conclusion:
- 605 is the composite number which has factors 1, 5, 11, 55, 121 and 605.
- And hence, 605 is not the prime number.
Multiple Choice Questions:
1) 605 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 605 are
a) 1
b) 5, 11
c) 1, 55, 121 and 605
d) 1, 5, 11, 55, 121 and 605
Ans: b) 5, 11
3) 605 is the odd composite number because
a) It has factors 1, 5, 11, 55, 121 and 605
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c