Is 1128 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 1128 is composite or not first we have to find its factors.
Contents
Factors of 1128:
- If we have taken numbers from 1, 2, 3…for checking factors of 1128, we found that 1128 has factors 1, 2, 3, 4, 6, 8, 12, 24, 47, 94, 141, 188, 282, 376, 564 and 1128. Hence, we must say that 1128 is a composite number.
- Thus, 1128 is the composite number.
- If we multiply 1128 by 1, 2, 3 then we get the multiples of 1128 which are 1128, 2256 and so on.
About the number 1128:
- 1128 has more than two factors which are 1, 2, 3, 4, 6, 8, 12, 24, 47, 94, 141, 188, 282, 376, 564 and 1128 and hence it is the composite number.
- 1128 is the even composite number and it is not the perfect square also.
- If we divide 1128 by 1, 2, 3, 4, 6, 8, 12, 24, 47, 94, 141, 188, 282, 376, 564 and 1128 then we get remainder as zero. Hence, 1, 2, 3, 4, 6, 8, 12, 24, 47, 94, 141, 188, 282, 376, 564 and 1128 are the factors of 1128.
Note:
- 1128 is not the perfect square.
- Factors of 1128: 1, 2, 3, 4, 6, 8, 12, 24, 47, 94, 141, 188, 282, 376, 564 and 1128
- Prime factors of 1128: 2, 3, 47
Conclusion:
- 1128 is the composite number which has factors1, 2, 3, 4, 6, 8, 12, 24, 47, 94, 141, 188, 282, 376, 564 and 1128
- And hence, 1128 is not the prime number.
Multiple Choice Questions:
1) 1128 is a
a) Even number
b) Not a perfect square number
c) Composite number
d) all
Ans: d) all
2) The composite factors of a composite number 1128 are
a) 4, 6, 8, 12, 24, 94, 141, 188, 282, 376, 564 and 1128
b) 2, 3, 47
c) 1, 4, 6, 8, 12, 24, 94, 141, 188, 282, 376, 564 and 1128
d) 1, 2, 3, 4, 6, 8, 12, 24, 47, 94, 141, 188, 282, 376, 564 and 1128
Ans: a) 4, 6, 8, 12, 24, 94, 141, 188, 282, 376, 564 and 1128
3) 1128 is composite number because
a) It has factors1, 2, 3, 4, 6, 8, 12, 24, 47, 94, 141, 188, 282, 376, 564 and 1128
b) It has more than two factors
c) Divisible by 2
d) Both a and b
Ans: d) both a and b