Is 989 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 989 is composite or not first we have to find its factors.
Contents
Factors of 989:
- If we have taken numbers from 1, 2, 3…for checking factors of 989, we found that 989 has factors 1, 23, 43 and 989. Hence, we must say that 989 is a composite number.
- Thus, 989 is the composite number.
- If we multiply 989 by 1, 2, 3 then we get the multiples of 989 which are 989, 1978 and so on.
989 is a Composite number or Prime number
About the number 989:
- 989 has more than two factors which are 1, 23, 43 and 989 and hence it is the composite number.
- 989 is the odd composite number and it is not the perfect square also.
- If we divide 989 by 1, 23, 43 and 989 then we get remainder as zero. Hence, 1, 23, 43 and 989 are the factors of 989
Note:
- 989 is not the perfect square.
- Factors of 989: 1, 23, 43 and 989
- Prime factors of 989: 23, 43
Conclusion:
- 989 is the composite number which has factors 1, 23, 43 and 989.
- And hence, 989 is not the prime number.
Multiple Choice Questions:
1) 989 is a
a) odd number
b) Prime number
c) Composite number
d) Both a and c
Ans: d) both a and c
2) The prime factors of a composite number 989 are
a) 1
b) 23, 43
c) 1 and 989
d) 1, 23, 43 and 989
Ans: b) 23, 43
3) 989 is the odd composite number because
a) It has factors 1, 23, 43 and 989
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c