Is 2989 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 2989 is composite or not first we have to find its factors.
Contents
Factors of 2989:
- If we have taken numbers from 1, 2, 3…for checking factors of 2989, we found that 2989 has factors 1, 7, 49, 61, 427 and 2989. Hence, we must say that 2989 is a composite number.
- Thus, 2989 is the composite number.
- If we multiply 2989 by 1, 2, 3 then we get the multiples of 2989 which are 2989, 5978 and so on.
2989 is a Composite number or Prime number
About the number 2989:
- 2989 has more than two factors which are 1, 7, 49, 61, 427 and 2989 and hence it is the composite number.
- 2989 is the odd composite number and it is not the perfect square also.
- If we divide 2989 by 1, 7, 49, 61, 427 and 2989 then we get remainder as zero. Hence 1, 7, 49, 61, 427 and 2989 are the factors of 2989
Note:
- 2989 is not the perfect square.
- Factors of 2989: 1, 7, 49, 61, 427 and 2989
- Prime factors of 2989: 7, 61
Conclusion:
- 2989 is the composite number which has factors 1, 7, 49, 61, 427 and 2989.
- And hence, 2989 is not the prime number.
Multiple Choice Questions:
1) 2989 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 2989 are
a) 1
b) 7, 61
c) 1, 7, 49, 61, 427 and 2989
d) 1, 49, 427 and 2989
Ans: d) 1, 49, 427 and 2989
3) 2989 is the odd composite number because
a) It has factors 1, 7, 49, 61, 427 and 2989
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all