Is 1278 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 1278 is composite or not first we have to find its factors.
Contents
Factors of 1278:
- If we have taken numbers from 1, 2, 3…for checking factors of 1278, we found that 1278 has factors 1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639 and 1278. Hence, we must say that 1278 is a composite number.
- Thus, 1278 is the composite number.
- If we multiply 1278 by 1, 2, 3 then we get the multiples of 1278 which are 1278, 2556 and so on.
About the number 1278:
- 1278 has more than two factors which are 1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639 and 1278 and hence it is the composite number.
- 1278 is the even composite number and it is not the perfect square also.
- If we divide 1278 by 1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639 and 1278 then we get remainder as zero. Hence, 1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639 and 1278 are the factors of 1278.
Note:
- 1278 is not the perfect square.
- Factors of 1278: 1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639 and 1278
- Prime factors of 1278: 2, 3, 71
Conclusion:
- 1278 is the composite number which has factors 1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639 and 1278
- And hence, 1278 is not the prime number.
Multiple Choice Questions:
1) 1278 is a
a) Even number
b) Not a perfect square number
c) Composite number
d) all
Ans: d) all
2) The composite factors of a composite number 1278 are
a) 6, 9, 18, 142, 213, 426, 639 and 1278
b) 2, 3, 71
c) 1, 6, 9, 18, 142, 213, 426, 639 and 1278
d) 1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639 and 1278
Ans: a) 6, 9, 18, 142, 213, 426, 639 and 1278
3) 1278 is composite number because
a) It has factors 1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639 and 1278
b) It has more than two factors
c) Divisible by 2
d) Both a and b
Ans: d) both a and b