Is 2815 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 2815 is composite or not first we have to find its factors.
Contents
Factors of 2815:
- If we have taken numbers from 1, 2, 3…for checking factors of 2815, we found that 2815 has factors 1, 5, 563 and 2815. Hence, we must say that 2815 is a composite number.
- Thus, 2815 is the composite number.
- If we multiply 2815 by 1, 2, 3 then we get the multiples of 2815 which are 2815, 5630 and so on.
2815 is a Composite number or Prime number
About the number 2815:
- 2815 has more than two factors which are 1, 5, 563 and 2815 and hence it is the composite number.
- 2815 is the odd composite number and it is not the perfect square also.
- If we divide 2815 by 1, 5, 563 and 2815 then we get remainder as zero. Hence 1, 5, 563 and 2815 are the factors of 2815
Note:
- 2815 is not the perfect square.
- Factors of 2815: 1, 5, 563 and 2815
- Prime factors of 2815: 5, 563
Conclusion:
- 2815 is the composite number which has factors 1, 5, 563 and 2815.
- And hence, 2815 is not the prime number.
Multiple Choice Questions:
1) 2815 is a
a) odd number
b) Prime number
c) even number
d) Both a and c
Ans: a) odd number
2) The non-prime factors of a composite number 2815 are
a) 1
b) 5, 563
c) 1, 5, 563 and 2815
d) 1 and 2815
Ans: d) 1 and 2815
3) 2815 is the odd composite number because
a) It has factors 1, 5, 563 and 2815
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all