Is 663 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 663 is composite or not first we have to find its factors.
Contents
Factors of 663:
- If we have taken numbers from 1, 2, 3…for checking factors of 663, we found that 663 has factors 1, 3, 13, 17, 39, 51, 221 and 663. Hence, we must say that 663 is a composite number.
- Thus, 663 is the composite number.
- If we multiply 663 by 1, 2, 3 then we get the multiples of 663 which are 663, 1326 and so on.
663 is a Composite number or Prime number
About the number 663:
- 663 has more than two factors which are 1, 3, 13, 17, 39, 51, 221 and 663 and hence it is the composite number.
- 663 is the odd composite number and it is not the perfect square also.
- If we divide 663 by 1, 3, 13, 17, 39, 51, 221 and 663 then we get remainder as zero. Hence, 1, 3, 13, 17, 39, 51, 221 and 663 are the factors of 663.
Note:
- 663 is not the perfect square.
- Factors of 663: 1, 3, 13, 17, 39, 51, 221 and 663
- Prime factors of 663: 3, 13, 17
Conclusion:
- 663 is the composite number which has factors 1, 3, 13, 17, 39, 51, 221 and 663.
- And hence, 663 is not the prime number.
Multiple Choice Questions:
1) 663 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 663 are
a) 1
b) 3, 13, 17
c) 1, 39, 51, 221 and 663
d) 1, 3, 13, 17, 39, 51, 221 and 663
Ans: b) 3, 13, 17
3) 663 is the odd composite number because
a) It has factors 1, 3, 13, 17, 39, 51, 221 and 663
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c