Is 805 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 805 is composite or not first we have to find its factors.
Contents
Factors of 805:
- If we have taken numbers from 1, 2, 3…for checking factors of 805, we found that 805 has factors 1, 5, 7, 23, 35, 115, 161 and 805. Hence, we must say that 805 is a composite number.
- Thus, 805 is the composite number.
- If we multiply 805 by 1, 2, 3 then we get the multiples of 805 which are 805, 1610 and so on.
805 is a Composite number or Prime number
About the number 805:
- 805 has more than two factors which are 1, 5, 7, 23, 35, 115, 161 and 805 and hence it is the composite number.
- 805 is the odd composite number and it is not the perfect square also.
- If we divide 805 by 1, 5, 7, 23, 35, 115, 161 and 805 then we get remainder as zero. Hence, 1, 5, 7, 23, 35, 115, 161 and 805 are the factors of 805
Note:
- 805 is not the perfect square.
- Factors of 805: 1, 5, 7, 23, 35, 115, 161 and 805
- Prime factors of 805: 5, 7, 23
Conclusion:
- 805 is the composite number which has factors 1, 5, 7, 23, 35, 115, 161 and 805.
- And hence, 805 is not the prime number.
Multiple Choice Questions:
1) 805 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 805 are
a) 1
b) 5, 7, 23
c) 1, 35, 115, 161 and 805
d) 1, 5, 7, 23, 35, 115, 161 and 805
Ans: b) 5, 7, 23
3) 805 is the odd composite number because
a) It has factors 1, 5, 7, 23, 35, 115, 161 and 805
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c