Is 3145 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 3145 is composite or not first we have to find its factors.
Contents
Factors of 3145:
- If we have taken numbers from 1, 2, 3…for checking factors of 3145, we found that 3145 has factors 1, 5, 17, 37, 85, 185, 629 and 3145. Hence, we must say that 3145 is a composite number.
- Thus, 3145 is the composite number.
- If we multiply 3145 by 1, 2, 3 then we get the multiples of 3145 which are 3145, 6290 and so on.
3145 is a Composite number or Prime number
About the number 3145:
- 3145 has more than two factors which are 1, 5, 17, 37, 85, 185, 629 and 3145 and hence it is the composite number.
- 3145 is the odd composite number and it is not the perfect square also.
- If we divide 3145 by 1, 5, 17, 37, 85, 185, 629 and 3145 then we get remainder as zero. Hence 1, 5, 17, 37, 85, 185, 629 and 3145 are the factors of 3145
Note:
- 3145 is not the perfect square.
- Factors of 3145: 1, 5, 17, 37, 85, 185, 629 and 3145
- Prime factors of 3145: 5, 17, 37
Conclusion:
- 3145 is the composite number which has factors 1, 5, 17, 37, 85, 185, 629 and 3145.
- And hence, 3145 is not the prime number.
Multiple Choice Questions:
1) 3145 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 3145 are
a) 1
b) 5, 17, 37
c) 1, 5, 17, 37, 85, 185, 629 and 3145
d) 1, 85, 185, 629 and 3145
Ans: d) 1, 85, 185, 629 and 3145
3) 3145 is the odd composite number because
a) It has factors 1, 5, 17, 37, 85, 185, 629 and 3145
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all
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