Is 3940 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 3940 is composite or not first we have to find its factors.
Contents
Factors of 3940:
- If we have taken numbers from 1, 2, 3…for checking factors of 3940, we found that 3940 has factors 1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970 and 3940. Hence, we must say that 3940 is a composite number.
- Thus, 3940 is the composite number.
- If we multiply 3940 by 1, 2, 3 then we get the multiples of 3940 which are 3940, 7880 and so on.
About the number 3940:
- 3940 has more than two factors which are 1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970 and 3940 and hence it is the composite number.
- 3940 is the even composite number and it is not the perfect square also.
- If we divide 3940 by, 1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970 and 3940 then we get remainder as zero. Hence, 1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970 and 3940 are the factors of 3940.
Note:
- 3940 is not the perfect square.
- Factors of 3940: 1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970 and 3940
- Prime factors of 3940: 2, 5, 197
Conclusion:
- 3940 is the composite number which has factors, 1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970 and 3940
- And hence, 3940 is not the prime number.
Multiple Choice Questions:
1) 3940 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 3940 are
a) 3940
b) 2, 5, 197
c) 4, 10, 20, 394, 788, 985, 1970 and 3940
d) 1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970 and 3940
Ans: c) 4, 10, 20, 394, 788, 985, 1970 and 3940
3) 3940 is composite number because
a) It has factors 1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970 and 3940
b) It has more than two factors
c) Divisible by 2
d) Both a and b
Ans: d) both a and b