Is 1388 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 1388 is composite or not first we have to find its factors.
Contents
Factors of 1388:
- If we have taken numbers from 1, 2, 3…for checking factors of 1388, we found that 1388 has factors 1, 2, 4, 347, 694 and 1388. Hence, we must say that 1388 is a composite number.
- Thus, 1388 is the composite number.
- If we multiply 1388 by 1, 2, 3 then we get the multiples of 1388 which are 1388, 2776 and so on.
About the number 1388:
- 1388 has more than two factors which are 1, 2, 4, 347, 694 and 1388 and hence it is the composite number.
- 1388 is the even composite number and it is not the perfect square also.
- If we divide 1388 by 1, 2, 4, 347, 694 and 1388 then we get remainder as zero. Hence, 1, 2, 4, 347, 694 are the factors of 1388.
Note:
- 1388 is not the perfect square.
- Factors of 1388: 1, 2, 4, 347, 694 and 1388
- Prime factors of 1388: 2, 347
Conclusion:
- 1388 is the composite number which has factors 1, 2, 4, 347, 694 and 1388
- And hence, 1388 is not the prime number.
Multiple Choice Questions:
1) 1388 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 1388 are
a) 4, 694 and 1388
b) 2, 347
c) 1, 4, 694 and 1388
d) 1, 2, 4, 347, 694 and 1388
Ans: a) 4, 694 and 1388
3) 1388 is composite number because
a) It has factors 1, 2, 4, 347, 694 and 1388
b) It has more than two factors
c) Divisible by 2
d) Both a and b
Ans: d) both a and b