Is 27 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 27 is a composite or not first we have to find its factors.
Contents
Factors of 27:
- If we have taken numbers from 1, 2, 3…for checking factors of 27, we found that 27 has factors 1, 3, 9 and 27. Hence, we must say that 27 is a composite number.
- Thus, 27 is the composite number.
- If we multiply 27 by 1, 2, 3, then we get the multiples of 27 which are 27, 54, and so on.
About the number 27:
- 27 has more than two factors which are 1, 3, 9and 27 and hence it is the composite number.
- 27 is the odd composite number and it is not the perfect square also.
- If we divide 27 by 1, 3, 9 and 27 then we get remainder as zero. Hence, 1, 3, 9 and 27 are the factors of 27.
Note:
- 27 is not the perfect square.
- Factors of 27: 1, 3, 9, 27
- Prime factors of 27: 3
Conclusion:
- 27 is the composite number which has factors 1, 3. 9and 27.
- And hence, 27 is not the prime number.
Multiple Choice Questions:
1) 27 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 27 are
a) 1
b) 3
c) Both a and b
d) 271
Ans: b) 3
3) 1 is the not prime factor of 27 because
a) It is the prime number
b) 1 is neither prime nor composite number
c) Both a and b
d) Given statement is false
Ans: b) 1 is neither prime nor composite number