Is 851 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 851 is composite or not first we have to find its factors.
Factors of 851:
- If we have taken numbers from 1, 2, 3…for checking factors of 851, we found that 851 has factors 1, 23, 37 and 851. Hence, we must say that 851 is a composite number.
- Thus, 851 is the composite number.
- If we multiply 851 by 1, 2, 3 then we get the multiples of 851 which are 851, 1702 and so on.
851 is a Composite number or Prime number
About the number 851:
- 851 has more than two factors which are 1, 23, 37 and 851 and hence it is the composite number.
- 851 is the odd composite number and it is not the perfect square also.
- If we divide 851 by 1, 23, 37 and 851 then we get remainder as zero. Hence, 1, 23, 37 and 851 are the factors of 851
Note:
- 851 is not the perfect square.
- Factors of 851: 1, 23, 37 and 851
- Prime factors of 851: 23, 37
Conclusion:
- 851 is the composite number which has factors 1, 23, 37 and 851.
- And hence, 851 is not the prime number.
Multiple Choice Questions:
1) 851 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 851 are
a) 1
b) 23, 37
c) 1 and 851
d) 1, 23, 37 and 851
Ans: b) 23, 37
3) 851 is the odd composite number because
a) It has factors 1, 23, 37 and 851
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c