Is 1243 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 1243 is composite or not first we have to find its factors.
Contents
Factors of 1243:
- If we have taken numbers from 1, 2, 3…for checking factors of 1243, we found that 1243 has factors 1, 11, 113 and 1243. Hence, we must say that 1243 is a composite number.
- Thus, 1243 is the composite number.
- If we multiply 1243 by 1, 2, 3 then we get the multiples of 1243 which are 1243, 2486 and so on.
1243 is a Composite number or Prime number
About the number 1243:
- 1243 has more than two factors which are 1, 11, 113 and 1243 and hence it is the composite number.
- 1243 is the odd composite number and it is not the perfect square also.
- If we divide 1243 by 1, 11, 113 and 1243 then we get remainder as zero. Hence, 1, 11, 113 and 1243 are the factors of 1243
Note:
- 1243 is not the perfect square.
- Factors of 1243: 1, 11, 113 and 1243
- Prime factors of 1243: 11, 113
Conclusion:
- 1243 is the composite number which has factors 1, 11, 113 and 1243.
- And hence, 1243 is not the prime number.
Multiple Choice Questions:
1) 1243 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 1243 are
a) 1
b) 11, 113
c) 1 and 1243
d) 1, 11, 113 and 1243
Ans: b) 1 and 1243
3) 1243 is the odd composite number because
a) It has factors 1, 11, 113 and 1243
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all