Is 1813 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 1813 is composite or not first we have to find its factors.
Contents
Factors of 1813:
- If we have taken numbers from 1, 2, 3…for checking factors of 1813, we found that 1813 has factors 1, 7, 37, 49, 259 and 1813. Hence, we must say that 1813 is a composite number.
- Thus, 1813 is the composite number.
- If we multiply 1813 by 1, 2, 3 then we get the multiples of 1813 which are 1813, 3626 and so on.
1813 is a Composite number or Prime number
About the number 1813:
- 1813 has more than two factors which are 1, 7, 37, 49, 259 and 1813 and hence it is the composite number.
- 1813 is the odd composite number and it is not the perfect square also.
- If we divide 1813 by 1, 7, 37, 49, 259 and 1813 then we get remainder as zero. Hence, 1, 7, 37, 49, 259 and 1813 are the factors of 1813
Note:
- 1813 is not the perfect square.
- Factors of 1813: 1, 7, 37, 49, 259 and 1813
- Prime factors of 1813: 7, 37
Conclusion:
- 1813 is the composite number which has factors 1, 7, 37, 49, 259 and 1813.
- And hence, 1813 is not the prime number.
Multiple Choice Questions:
1) 1813 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 1813 are
a) 1
b) 7, 37
c) 1, 49, 259 and 1813
d) 1, 7, 37, 49, 259 and 1813
Ans: b) 1, 49, 259 and 1813
3) 1813 is the odd composite number because
a) It has factors 1, 7, 37, 49, 259 and 1813
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all