Is 1690 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 1690 is composite or not first we have to find its factors.
Contents
Factors of 1690:
- If we have taken numbers from 1, 2, 3…for checking factors of 1690, we found that 1690 has factors 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690. Hence, we must say that 1690 is a composite number.
- Thus, 1690 is the composite number.
- If we multiply 1690 by 1, 2, 3 then we get the multiples of 1690 which are 1690, 3380 and so on.
About the number 1690:
- 1690 has more than two factors which are 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690 and hence it is the composite number.
- 1690 is the even composite number and it is not the perfect square also.
- If we divide 1690 by 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690 then we get remainder as zero. Hence, 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690 are the factors of 1690.
Note:
- 1690 is not the perfect square.
- Factors of 1690: 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690
- Prime factors of 1690: 2, 5, 13
Conclusion:
- 1690 is the composite number which has factors 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690
- And hence, 1690 is not the prime number.
Multiple Choice Questions:
1) 1690 is a
a) Prime number
b) Odd number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1690 are
a) 1690
b) 2, 5, 13
c) 1, 10, 26, 65, 130, 169, 338, 845 and 1690
d) 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690
Ans: c) 1, 10, 26, 65, 130, 169, 338, 845 and 1690
3) 1690 is composite number because
a) It has factors 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690
b) It has only two factors
c) Divisible by 2
d) Both a and c
Ans: a) it has factors 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845 and 1690