Is 3998 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 3998 is composite or not first we have to find its factors.
Contents
Factors of 3998:
- If we have taken numbers from 1, 2, 3…for checking factors of 3998, we found that 3998 has factors 1, 2, 1999 and 3998. Hence, we must say that 3998 is a composite number.
- Thus, 3998 is the composite number.
- If we multiply 3998 by 1, 2, 3 then we get the multiples of 3998 which are 3998, 7996 and so on.
About the number 3998:
- 3998 has more than two factors which are 1, 2, 1999 and 3998 and hence it is the composite number.
- 3998 is the even composite number and it is not the perfect square also.
- If we divide 3998 by, 1, 2, 1999 and 3998 then we get remainder as zero. Hence, 1, 2, 1999 and 3998 are the factors of 3998.
Note:
- 3998 is not the perfect square.
- Factors of 3998: 1, 2, 1999 and 3998
- Prime factors of 3998: 2, 1999
Conclusion:
- 3998 is the composite number which has factors, 1, 2, 1999 and 3998
- And hence, 3998 is not the prime number.
Multiple Choice Questions:
1) 3998 is a
a) Prime number
b) Even number
c) Composite number
d) Both b and c
Ans: d) both b and c
2) The composite factors of a composite number 3998 are
a) 3998
b) 2, 1999
c) 3998
d) 1, 2, 1999 and 3998
Ans: c) 3998
3) 3998 is composite number because
a) It has factors 1, 2, 1999 and 3998
b) It has more than two factors
c) Divisible by 2
d) Both a and b
Ans: d) both a and b