Is 1143 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 1143 is composite or not first we have to find its factors.
Contents
Factors of 1143:
- If we have taken numbers from 1, 2, 3…for checking factors of 1143, we found that 1143 has factors 1, 3, 9, 127, 381 and 1143. Hence, we must say that 1143 is a composite number.
- Thus, 1143 is the composite number.
- If we multiply 1143 by 1, 2, 3 then we get the multiples of 1143 which are 1143, 2286 and so on.
1143 is a Composite number or Prime number
About the number 1143:
- 1143 has more than two factors which are 1, 3, 9, 127, 381 and 1143 and hence it is the composite number.
- 1143 is the odd composite number and it is not the perfect square also.
- If we divide 1143 by 1, 3, 9, 127, 381 and 1143 then we get remainder as zero. Hence, 1, 3, 9, 127, 381 and 1143 are the factors of 1143
Note:
- 1143 is not the perfect square.
- Factors of 1143: 1, 3, 9, 127, 381 and 1143
- Prime factors of 1143: 3, 127
Conclusion:
- 1143 is the composite number which has factors 1, 3, 9, 127, 381 and 1143.
- And hence, 1143 is not the prime number.
Multiple Choice Questions:
1) 1143 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 1143 are
a) 1
b) 3, 127
c) 1, 9, 381 and 1143
d) 1, 3, 9, 127, 381 and 1143
Ans: b) 3, 127
3) 1143 is the odd composite number because
a) It has factors 1, 3, 9, 127, 381 and 1143
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c