Is 1131 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 1131 is composite or not first we have to find its factors.
Contents
Factors of 1131:
- If we have taken numbers from 1, 2, 3…for checking factors of 1131, we found that 1131 has factors 1, 3, 13, 29, 39, 87, 377 and 1131. Hence, we must say that 1131 is a composite number.
- Thus, 1131 is the composite number.
- If we multiply 1131 by 1, 2, 3 then we get the multiples of 1131 which are 1131, 2262 and so on.
1131 is a Composite number or Prime number
About the number 1131:
- 1131 has more than two factors which are 1, 3, 13, 29, 39, 87, 377 and 1131 and hence it is the composite number.
- 1131 is the odd composite number and it is not the perfect square also.
- If we divide 1131 by 1, 3, 13, 29, 39, 87, 377 and 1131 then we get remainder as zero. Hence, 1, 3, 13, 29, 39, 87, 377 and 1131 are the factors of 1131
Note:
- 1131 is not the perfect square.
- Factors of 1131: 1, 3, 13, 29, 39, 87, 377 and 1131
- Prime factors of 1131: 3, 13, 29
Conclusion:
- 1131 is the composite number which has factors 1, 3, 13, 29, 39, 87, 377 and 1131.
- And hence, 1131 is not the prime number.
Multiple Choice Questions:
1) 1131 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 1131 are
a) 1
b) 3, 13, 29
c) 1, 39, 87, 377 and 1131
d) 1, 3, 13, 29, 39, 87, 377 and 1131
Ans: b) 3, 13, 29
3) 1131 is the odd composite number because
a) It has factors 1, 3, 13, 29, 39, 87, 377 and 1131
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c