Is 1125 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 1125 is composite or not first we have to find its factors.
Contents
Factors of 1125:
- If we have taken numbers from 1, 2, 3…for checking factors of 1125, we found that 1125 has factors 1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375 and 1125. Hence, we must say that 1125 is a composite number.
- Thus, 1125 is the composite number.
- If we multiply 1125 by 1, 2, 3 then we get the multiples of 1125 which are 1125, 2250 and so on.
1125 is a Composite number or Prime number
About the number 1125:
- 1125 has more than two factors which are 1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375 and 1125 and hence it is the composite number.
- 1125 is the odd composite number and it is not the perfect square also.
- If we divide 1125 by 1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375 and 1125 then we get remainder as zero. Hence, 1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375 and 1125 are the factors of 1125
Note:
- 1125 is not the perfect square.
- Factors of 1125: 1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375 and 1125
- Prime factors of 1125: 3, 5
Conclusion:
- 1125 is the composite number which has factors 1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375 and 1125.
- And hence, 1125 is not the prime number.
Multiple Choice Questions:
1) 1125 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 1125 are
a) 1
b) 3, 5
c) 1, 9, 15, 25, 45, 75, 125, 225, 375 and 1125
d) 1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375 and 1125
Ans: b) 3, 5
3) 1125 is the odd composite number because
a) It has factors 1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375 and 1125
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c