Is 999 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 999 is composite or not first we have to find its factors.
Contents
Factors of 999:
- If we have taken numbers from 1, 2, 3…for checking factors of 999, we found that 999 has factors 1, 3, 9, 27, 37, 111, 333 and 999. Hence, we must say that 999 is a composite number.
- Thus, 999 is the composite number.
- If we multiply 999 by 1, 2, 3 then we get the multiples of 999 which are 999, 1998 and so on.
999 is a Composite number or Prime number
About the number 999:
- 999 has more than two factors which are 1, 3, 9, 27, 37, 111, 333 and 999 and hence it is the composite number.
- 999 is the odd composite number and it is not the perfect square also.
- If we divide 999 by 1, 3, 9, 27, 37, 111, 333 and 999 then we get remainder as zero. Hence, 1, 3, 9, 27, 37, 111, 333 and 999 are the factors of 999
Note:
- 999 is not the perfect square.
- Factors of 999: 1, 3, 9, 27, 37, 111, 333 and 999
- Prime factors of 999: 3, 37
Conclusion:
- 999 is the composite number which has factors 1, 3, 9, 27, 37, 111, 333 and 999.
- And hence, 999 is not the prime number.
Multiple Choice Questions:
1) 999 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 999 are
a) 1
b) 3, 37
c) 1, 9, 27, 111, 333 and 999
d) 1, 3, 9, 27, 37, 111, 333 and 999
Ans: b) 3, 37
3) 999 is the odd composite number because
a) It has factors 1, 3, 9, 27, 37, 111, 333 and 999
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c