Is 247 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 247 is composite or not first we have to find its factors.
Contents
Factors of 247:
- If we have taken numbers from 1, 2, 3…for checking factors of 247, we found that 247 has factors 1, 13, 19 and 247. Hence, we must say that 247 is a composite number.
- Thus, 247 is the composite number.
- If we multiply 247 by 1, 2, 3 then we get the multiples of 247 which are 247, 494, and so on.
247 is a Composite number or Prime number
About the number 247:
- 247 has more than two factors which are 1, 13, 19 and 247 and hence it is the composite number.
- 247 is the odd composite number and it is not the perfect square also.
- If we divide 247 by 1, 13, 19 and 247 then we get remainder as zero. Hence, 1, 13, 19 and 247 are the factors of 247.
Note:
- 247 is not the perfect square.
- Factors of 247: 1, 13, 19 and 247
- Prime factors of 247: 13, 19
Conclusion:
- 247 is the composite number which has factors 1, 13, 19 and 247.
- And hence, 247 is not the prime number.
Multiple Choice Questions:
1) 247 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 247 are
a) 1
b) 13, 19
c) 1 and 247
d) 1, 13, 19 and 247
Ans: b) 13, 19
3) 247 is the odd composite number because
a) It has factors 1, 13, 19 and 247
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c