Is 905 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 905 is composite or not first we have to find its factors.
Contents
Factors of 905:
- If we have taken numbers from 1, 2, 3…for checking factors of 905, we found that 905 has factors 1, 5, 181 and 905. Hence, we must say that 905 is a composite number.
- Thus, 905 is the composite number.
- If we multiply 905 by 1, 2, 3 then we get the multiples of 905 which are 905, 1810 and so on.
905 is a Composite number or Prime number
About the number 905:
- 905 has more than two factors which are 1, 5, 181 and 905 and hence it is the composite number.
- 905 is the odd composite number and it is not the perfect square also.
- If we divide 905 by 1, 5, 181 and 905 then we get remainder as zero. Hence, 1, 5, 181 and 905 are the factors of 905
Note:
- 905 is not the perfect square.
- Factors of 905: 1, 5, 181 and 905
- Prime factors of 905: 5, 181
Conclusion:
- 905 is the composite number which has factors 1, 5, 181 and 905.
- And hence, 905 is not the prime number.
Multiple Choice Questions:
1) 905 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 905 are
a) 1
b) 5, 181
c) 1 and 905
d) 1, 5, 181 and 905
Ans: b) 5, 181
3) 905 is the odd composite number because
a) It has factors 1, 5, 181 and 905
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c