Is 279 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 279 is composite or not first we have to find its factors.
Contents
Factors of 279:
- If we have taken numbers from 1, 2, 3…for checking factors of 279, we found that 279 has factors 1, 3, 9, 31, 93 and 279. Hence, we must say that 279 is a composite number.
- Thus, 279 is the composite number.
- If we multiply 279 by 1, 2, 3 then we get the multiples of 279 which are 279, 558, and so on.
279 is a Composite number or Prime number
About the number 279:
- 279 has more than two factors which are 1, 3, 9, 31, 93 and 279 and hence it is the composite number.
- 279 is the odd composite number and it is not the perfect square also.
- If we divide 279 by 1, 3, 9, 31, 93 and 279 then we get remainder as zero. Hence, 1, 3, 9, 31, 93 and 279 are the factors of 279.
Note:
- 279 is not the perfect square.
- Factors of 279: 1, 3, 9, 31, 93 and 279
- Prime factors of 279: 3, 31
Conclusion:
- 279 is the composite number which has factors 1, 3, 9, 31, 93 and 279.
- And hence, 279 is not the prime number.
Multiple Choice Questions:
1) 279 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 279 are
a) 1
b) 3, 31
c) 1, 9, 93 and 279
d) 1, 3, 9, 31, 93 and 279
Ans: b) 3, 31
3) 279 is the odd composite number because
a) It has factors 1, 3, 9, 31, 93 and 279
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c