Is 729 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 729 is composite or not first we have to find its factors.
Contents
Factors of 729:
- If we have taken numbers from 1, 2, 3…for checking factors of 729, we found that 729 has factors 1, 3, 9, 27, 81, 243 and 729. Hence, we must say that 729 is a composite number.
- Thus, 729 is the composite number.
- If we multiply 729 by 1, 2, 3 then we get the multiples of 729 which are 729, 1458 and so on.
729 is a Composite number or Prime number
About the number 729:
- 729 has more than two factors which are 1, 3, 9, 27, 81, 243 and 729 and hence it is the composite number.
- 729 is the odd composite number and it is the perfect square also.
- If we divide 729 by 1, 3, 9, 27, 81, 243 and 729 then we get remainder as zero. Hence, 1, 3, 9, 27, 81, 243 and 729 are the factors of 729
Note:
- 729 is the perfect square.
- Factors of 729: 1, 3, 9, 27, 81, 243 and 729
- Prime factors of 729: 3
Conclusion:
- 729 is the composite number which has factors 1, 3, 9, 27, 81, 243 and 729.
- And hence, 729 is not the prime number.
Multiple Choice Questions:
1) 729 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 729 are
a) 1
b) 3
c) 1, 9, 27, 81, 243 and 729
d) 1, 3, 9, 27, 81, 243 and 729
Ans: b) 3
3) 729 is the odd composite number because
a) It has factors 1, 3, 9, 27, 81, 243 and 729
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c