Is 618 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 618 is composite or not first we have to find its factors.
Contents
Factors of 618:
- If we have taken numbers from 1, 2, 3…for checking factors of 618, we found that 618 has factors 1, 2, 3, 6, 103, 206, 309 and 618. Hence, we must say that 618 is a composite number.
- Thus, 618 is the composite umber.
- If we multiply 618 by 1, 2, 3 then we get the multiples of 618 which are 618, 1236 and so on.
About the number 618:
- 618 has more than two factors which are 1, 2, 3, 6, 103, 206, 309 and 618 and hence it is the composite number.
- 618 is the even composite number and it is not the perfect square also.
- If we divide 618 by 1, 2, 3, 6, 103, 206, 309 and 618 then we get remainder as zero. Hence, 1, 2, 3, 6, 103, 206, 309 and 618 are the factors of 618.
Note:
- 618 is not the perfect square.
- Factors of 618: 1, 2, 3, 6, 103, 206, 309 and 618
- Prime factors of 618: 2, 3, 103
Conclusion:
- 618 is the composite number which has factors 1, 2, 3, 6, 103, 206, 309 and 618
- And hence, 618 is not the prime number.
Multiple Choice Questions:
1) 618 is a
a) Prime number
b) odd number
c) Composite number
d) Both b and c
Ans: c) composite number
2) The non-prime factors of a composite number 618 are
a) 1
b) 2, 3, 103
c) 1, 6, 206, 309 and 618
d) 1, 2, 3, 6, 103, 206, 309 and 618
Ans: c) 1, 6, 206, 309 and 618
3) 618 is the composite number because
a) It has two factors
b) More than two factors
c) Divisible by 2
d) Both b and c
Ans: b) more than two factors