Is 1390 is a Composite number

 Is 1390 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 1390 is composite or not first we have to find its factors.

 

Factors of 1390:

  • If we have taken numbers from 1, 2, 3…for checking factors of 1390, we found that 1390 has factors 1, 2, 5, 10, 139, 278, 695 and 1390. Hence, we must say that 1390 is a composite number.
  • Thus, 1390 is the composite number.
  • If we multiply 1390 by 1, 2, 3 then we get the multiples of 1390 which are 1390, 2780 and so on.

 

About the number 1390:

  • 1390 has more than two factors which are 1, 2, 5, 10, 139, 278, 695 and 1390 and hence it is the composite number.
  • 1390 is the even composite number and it is not the perfect square also.
  • If we divide 1390 by 1, 2, 5, 10, 139, 278, 695 and 1390 then we get remainder as zero. Hence, 1, 2, 5, 10, 139, 278, 695 are the factors of 1390.

 

Note:

  • 1390 is not the perfect square.
  • Factors of 1390: 1, 2, 5, 10, 139, 278, 695 and 1390
  • Prime factors of 1390: 2, 5, 139

 

Conclusion:

  • 1390 is the composite number which has factors 1, 2, 5, 10, 139, 278, 695 and 1390
  • And hence, 1390 is not the prime number.

 

Multiple Choice Questions:

 

1) 1390 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 1390 are

a) 10, 278, 695 and 1390

b) 2, 5, 139

c) 1,10, 278, 695 and 1390

d) 1, 2, 5, 10, 139, 278, 695 and 1390

Ans: a) 10, 278, 695 and 1390

 

3) 1390 is composite number because

a) It has factors 1, 2, 5, 10, 139, 278, 695 and 1390

b) It has more than two factors

c) Divisible by 2

d) Both a and b

Ans: d) both a and b

Updated: December 17, 2021 — 4:46 pm

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