Is 909 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 909 is composite or not first we have to find its factors.
Contents
Factors of 909:
- If we have taken numbers from 1, 2, 3…for checking factors of 909, we found that 909 has factors 1, 3, 9, 101, 303 and 909. Hence, we must say that 909 is a composite number.
- Thus, 909 is the composite number.
- If we multiply 909 by 1, 2, 3 then we get the multiples of 909 which are 909, 1818 and so on.
909 is a Composite number or Prime number
About the number 909:
- 909 has more than two factors which are 1, 3, 9, 101, 303 and 909 and hence it is the composite number.
- 909 is the odd composite number and it is not the perfect square also.
- If we divide 909 by 1, 3, 9, 101, 303 and 909 then we get remainder as zero. Hence, 1, 3, 9, 101, 303 and 909 are the factors of 909
Note:
- 909 is not the perfect square.
- Factors of 909: 1, 3, 9, 101, 303 and 909
- Prime factors of 909: 3, 101
Conclusion:
- 909 is the composite number which has factors 1, 3, 9, 101, 303 and 909.
- And hence, 909 is not the prime number.
Multiple Choice Questions:
1) 909 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 909 are
a) 1
b) 3, 101
c) 1, 9, 303 and 909
d) 1, 3, 9, 101, 303 and 909
Ans: b) 3, 101
3) 909 is the odd composite number because
a) It has factors 1, 3, 9, 101, 303 and 909
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c