Is 1642 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 1642 is composite or not first we have to find its factors.
Contents
Factors of 1642:
- If we have taken numbers from 1, 2, 3…for checking factors of 1642, we found that 1642 has factors 1, 2, 821 and 1642. Hence, we must say that 1642 is a composite number.
- Thus, 1642 is the composite number.
- If we multiply 1642 by 1, 2, 3 then we get the multiples of 1642 which are 1642, 3284 and so on.
About the number 1642:
- 1642 has more than two factors which are 1, 2, 821 and 1642 and hence it is the composite number.
- 1642 is the even composite number and it is not the perfect square also.
- If we divide 1642 by 1, 2, 821 and 1642 then we get remainder as zero. Hence, 1, 2, 821 and 1642 are the factors of 1642.
Note:
- 1642 is not the perfect square.
- Factors of 1642: 1, 2, 821 and 1642
- Prime factors of 1642: 2, 821
Conclusion:
- 1642 is the composite number which has factors 1, 2, 821 and 1642
- And hence, 1642 is not the prime number.
Multiple Choice Questions:
1) 1642 is a
a) Even number
b) Odd number
c) Composite number
d) Both a and c
Ans: d) both a and c
2) The prime factors of a composite number 1642 are
a) 1642
b) 2, 821
c) 1 and 1642
d) 1, 2, 821 and 1642
Ans: b) 2, 821
3) 1642 is even composite number because
a) It has factors 1, 2, 821 and 1642
b) It has more than two factors
c) Divisible by 2
d) all
Ans: d) all