Is 2985 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 2985 is composite or not first we have to find its factors.
Contents
Factors of 2985:
- If we have taken numbers from 1, 2, 3…for checking factors of 2985, we found that 2985 has factors 1, 3, 5, 15, 199, 597, 995 and 2985. Hence, we must say that 2985 is a composite number.
- Thus, 2985 is the composite number.
- If we multiply 2985 by 1, 2, 3 then we get the multiples of 2985 which are 2985, 5970 and so on.
2985 is a Composite number or Prime number
About the number 2985:
- 2985 has more than two factors which are 1, 3, 5, 15, 199, 597, 995 and 2985 and hence it is the composite number.
- 2985 is the odd composite number and it is not the perfect square also.
- If we divide 2985 by 1, 3, 5, 15, 199, 597, 995 and 2985 then we get remainder as zero. Hence 1, 3, 5, 15, 199, 597, 995 and 2985 are the factors of 2985
Note:
- 2985 is not the perfect square.
- Factors of 2985: 1, 3, 5, 15, 199, 597, 995 and 2985
- Prime factors of 2985: 3, 5, 199
Conclusion:
- 2985 is the composite number which has factors 1, 3, 5, 15, 199, 597, 995 and 2985.
- And hence, 2985 is not the prime number.
Multiple Choice Questions:
1) 2985 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 2985 are
a) 1
b) 3, 5, 199
c) 1, 3, 5, 15, 199, 597, 995 and 2985
d) 1, 15, 597, 995 and 2985
Ans: d) 1, 15, 597, 995 and 2985
3) 2985 is the odd composite number because
a) It has factors 1, 3, 5, 15, 199, 597, 995 and 2985
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all