Is 1855 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 1855 is composite or not first we have to find its factors.
Contents
Factors of 1855:
- If we have taken numbers from 1, 2, 3…for checking factors of 1855, we found that 1855 has factors 1, 5, 7, 35, 53, 265, 371 and 1855. Hence, we must say that 1855 is a composite number.
- Thus, 1855 is the composite number.
- If we multiply 1855 by 1, 2, 3 then we get the multiples of 1855 which are 1855, 3710 and so on.
1855 is a Composite number or Prime number
About the number 1855:
- 1855 has more than two factors which are 1, 5, 7, 35, 53, 265, 371 and 1855 and hence it is the composite number.
- 1855 is the odd composite number and it is not the perfect square also.
- If we divide 1855 by 1, 5, 7, 35, 53, 265, 371 and 1855 then we get remainder as zero. Hence, 1, 5, 7, 35, 53, 265, 371 and 1855 are the factors of 1855
Note:
- 1855 is not the perfect square.
- Factors of 1855: 1, 5, 7, 35, 53, 265, 371 and 1855
- Prime factors of 1855: 5, 53
Conclusion:
- 1855 is the composite number which has factors 1, 5, 7, 35, 53, 265, 371 and 1855.
- And hence, 1855 is not the prime number.
Multiple Choice Questions:
1) 1855 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1855 are
a) 1
b) 5, 53
c) 1, 7, 35, 265, 371 and 1855
d) 1, 5, 7, 35, 53, 265, 371 and 1855
Ans: b) 1, 7, 35, 265, 371 and 1855
3) 1855 is the odd composite number because
a) It has factors 1, 5, 7, 35, 53, 265, 371 and 1855
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all