Is 1161 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 1161 is composite or not first we have to find its factors.
Contents
Factors of 1161:
- If we have taken numbers from 1, 2, 3…for checking factors of 1161, we found that 1161 has factors 1, 3, 9, 27, 43, 129, 387 and 1161. Hence, we must say that 1161 is a composite number.
- Thus, 1161 is the composite number.
- If we multiply 1161 by 1, 2, 3 then we get the multiples of 1161 which are 1161, 2322 and so on.
1161 is a Composite number or Prime number
About the number 1161:
- 1161 has more than two factors which are 1, 3, 9, 27, 43, 129, 387 and 1161 and hence it is the composite number.
- 1161 is the odd composite number and it is not the perfect square also.
- If we divide 1161 by 1, 3, 9, 27, 43, 129, 387 and 1161 then we get remainder as zero. Hence, 1, 3, 9, 27, 43, 129, 387 and 1161 are the factors of 1161
Note:
- 1161 is not the perfect square.
- Factors of 1161: 1, 3, 9, 27, 43, 129, 387 and 1161
- Prime factors of 1161: 3, 43
Conclusion:
- 1161 is the composite number which has factors 1, 3, 9, 27, 43, 129, 387 and 1161.
- And hence, 1161 is not the prime number.
Multiple Choice Questions:
1) 1161 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 1161 are
a) 1
b) 3, 43
c) 1, 9, 27, 129, 387 and 1161
d) 1, 3, 9, 27, 43, 129, 387 and 1161
Ans: b) 3, 43
3) 1161 is the odd composite number because
a) It has factors 1, 3, 9, 27, 43, 129, 387 and 1161
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c