Is 1311 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 1311 is composite or not first we have to find its factors.
Contents
Factors of 1311:
- If we have taken numbers from 1, 2, 3…for checking factors of 1311, we found that 1311 has factors 1, 3, 19, 23, 57, 69, 437 and 1311. Hence, we must say that 1311 is a composite number.
- Thus, 1311 is the composite number.
- If we multiply 1311 by 1, 2, 3 then we get the multiples of 1311 which are 1311, 2622 and so on.
1311 is a Composite number or Prime number
About the number 1311:
- 1311 has more than two factors which are 1, 3, 19, 23, 57, 69, 437 and 1311 and hence it is the composite number.
- 1311 is the odd composite number and it is not the perfect square also.
- If we divide 1311 by 1, 3, 19, 23, 57, 69, 437 and 1311 then we get remainder as zero. Hence, 1, 3, 19, 23, 57, 69, 437 and 1311 are the factors of 1311
Note:
- 1311 is not the perfect square.
- Factors of 1311: 1, 3, 19, 23, 57, 69, 437 and 1311
- Prime factors of 1311: 3, 19, 23
Conclusion:
- 1311 is the composite number which has factors 1, 3, 19, 23, 57, 69, 437 and 1311.
- And hence, 1311 is not the prime number.
Multiple Choice Questions:
1) 1311 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1311 are
a) 1
b) 3, 19, 23
c) 1, 57, 69, 437 and 1311
d) 1, 3, 19, 23, 57, 69, 437 and 1311
Ans: b) 1, 57, 69, 437 and 1311
3) 1311 is the odd composite number because
a) It has factors 1, 3, 19, 23, 57, 69, 437 and 1311
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all