Is 1641 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 1641 is composite or not first we have to find its factors.
Contents
Factors of 1641:
- If we have taken numbers from 1, 2, 3…for checking factors of 1641, we found that 1641 has factors 1, 3, 547 and 1641. Hence, we must say that 1641 is a composite number.
- Thus, 1641 is the composite number.
- If we multiply 1641 by 1, 2, 3 then we get the multiples of 1641 which are 1641, 3282 and so on.
1641 is a Composite number or Prime number
About the number 1641:
- 1641 has more than two factors which are 1, 3, 547 and 1641 and hence it is the composite number.
- 1641 is the odd composite number and it is not the perfect square also.
- If we divide 1641 by 1, 3, 547 and 1641 then we get remainder as zero. Hence, 1, 3, 547 and 1641 are the factors of 1641
Note:
- 1641 is not the perfect square.
- Factors of 1641: 1, 3, 547 and 1641
- Prime factors of 1641: 3, 547
Conclusion:
- 1641 is the composite number which has factors 1, 3, 547 and 1641.
- And hence, 1641 is not the prime number.
Multiple Choice Questions:
1) 1641 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1641 are
a) 1
b) 3, 547
c) 1 and 1641
d) 1, 3, 547 and 1641
Ans: b) 1 and 1641
3) 1641 is the odd composite number because
a) It has factors 1, 3, 547 and 1641
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all