Is 2945 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 2945 is composite or not first we have to find its factors.
Contents
Factors of 2945:
- If we have taken numbers from 1, 2, 3…for checking factors of 2945, we found that 2945 has factors 1, 5, 19, 31, 95, 155, 589 and 2945. Hence, we must say that 2945 is a composite number.
- Thus, 2945 is the composite number.
- If we multiply 2945 by 1, 2, 3 then we get the multiples of 2945 which are 2945, 5890 and so on.
2945 is a Composite number or Prime number
About the number 2945:
- 2945 has more than two factors which are 1, 5, 19, 31, 95, 155, 589 and 2945 and hence it is the composite number.
- 2945 is the odd composite number and it is not the perfect square also.
- If we divide 2945 by 1, 5, 19, 31, 95, 155, 589 and 2945 then we get remainder as zero. Hence 1, 5, 19, 31, 95, 155, 589 and 2945 are the factors of 2945
Note:
- 2945 is not the perfect square.
- Factors of 2945: 1, 5, 19, 31, 95, 155, 589 and 2945
- Prime factors of 2945: 5, 19, 31
Conclusion:
- 2945 is the composite number which has factors 1, 5, 19, 31, 95, 155, 589 and 2945.
- And hence, 2945 is not the prime number.
Multiple Choice Questions:
1) 2945 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 2945 are
a) 1
b) 5, 19, 31
c) 1, 5, 19, 31, 95, 155, 589 and 2945
d) 1, 95, 155, 589 and 2945
Ans: d) 1, 95, 155, 589 and 2945
3) 2945 is the odd composite number because
a) It has factors 1, 5, 19, 31, 95, 155, 589 and 2945
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all