Is 3185 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 3185 is composite or not first we have to find its factors.
Contents
Factors of 3185:
- If we have taken numbers from 1, 2, 3…for checking factors of 3185, we found that 3185 has factors 1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637 and 3185. Hence, we must say that 3185 is a composite number.
- Thus, 3185 is the composite number.
- If we multiply 3185 by 1, 2, 3 then we get the multiples of 3185 which are 3185, 6370 and so on.
3185 is a Composite number or Prime number
About the number 3185:
- 3185 has more than two factors which are 1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637 and 3185 and hence it is the composite number.
- 3185 is the odd composite number and it is not the perfect square also.
- If we divide 3185 by 1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637 and 3185 then we get remainder as zero. Hence 1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637 and 3185 are the factors of 3185
Note:
- 3185 is not the perfect square.
- Factors of 3185: 1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637 and 3185
- Prime factors of 3185: 5, 7, 13
Conclusion:
- 3185 is the composite number which has factors 1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637 and 3185.
- And hence, 3185 is not the prime number.
Multiple Choice Questions:
1) 3185 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 3185 are
a) 1
b) 5, 7, 13
c) 1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637 and 3185
d) 1, 35, 49, 65, 91, 245, 455, 637 and 3185
Ans: d) 1, 35, 49, 65, 91, 245, 455, 637 and 3185
3) 3185 is the odd composite number because
a) It has factors 1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637 and 3185
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all
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