Is 668 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 668 is composite or not first we have to find its factors.
Contents
Factors of 668:
- If we have taken numbers from 1, 2, 3…for checking factors of 668, we found that 668 has factors 1, 2, 4, 167, 334 and 668. Hence, we must say that 668 is a composite number.
- Thus, 668 is the composite umber.
- If we multiply 668 by 1, 2, 3 then we get the multiples of 668 which are 668, 1336 and so on.
About the number 668:
- 668 has more than two factors which are 1, 2, 4, 167, 334 and 668 and hence it is the composite number.
- 668 is the even composite number and it is not the perfect square also.
- If we divide 668 by 1, 2, 4, 167, 334 and 668 then we get remainder as zero. Hence, 1, 2, 4, 167, 334 and 668 are the factors of 668.
Note:
- 668 is not the perfect square.
- Factors of 668: 1, 2, 4, 167, 334 and 668
- Prime factors of 668: 2, 167
Conclusion:
- 668 is the composite number which has factors 1, 2, 4, 167, 334 and 668
- And hence, 668 is not the prime number.
Multiple Choice Questions:
1) 668 is a
a) Not a perfect square number
b) Even number
c) Composite number
d) all
Ans: d) all
2) The prime and composite factors of a composite number 668 are
a) 1
b) 2, 167
c) 1, 4, 334 and 668
d) 1, 2, 4, 167, 334 and 668
Ans: d) 1, 2, 4, 167, 334 and 668
3) 668 is the even composite number because
a) It has factors 1, 2, 4, 167, 334 and 668
b) More than two factors
c) Divisible by 2
d) all
Ans: d) all