Is 3890 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 3890 is composite or not first we have to find its factors.
Contents
Factors of 3890:
- If we have taken numbers from 1, 2, 3…for checking factors of 3890, we found that 3890 has factors 1, 2, 5, 10, 389, 778, 1945 and 3890. Hence, we must say that 3890 is a composite number.
- Thus, 3890 is the composite number.
- If we multiply 3890 by 1, 2, 3 then we get the multiples of 3890 which are 3890, 7780 and so on.
About the number 3890:
- 3890 has more than two factors which are 1, 2, 5, 10, 389, 778, 1945 and 3890 and hence it is the composite number.
- 3890 is the even composite number and it is not the perfect square also.
- If we divide 3890 by, 1, 2, 5, 10, 389, 778, 1945 and 3890 then we get remainder as zero. Hence, 1, 2, 5, 10, 389, 778, 1945 and 3890 are the factors of 3890.
Note:
- 3890 is not the perfect square.
- Factors of 3890: 1, 2, 5, 10, 389, 778, 1945 and 3890
- Prime factors of 3890: 2, 5, 389
Conclusion:
- 3890 is the composite number which has factors, 1, 2, 5, 10, 389, 778, 1945 and 3890
- And hence, 3890 is not the prime number.
Multiple Choice Questions:
1) 3890 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 3890 are
a) 3890
b) 2, 5, 389
c) 10, 778, 1945 and 3890
d) 1, 2, 5, 10, 389, 778, 1945 and 3890
Ans: c) 10, 778, 1945 and 3890
3) 3890 is composite number because
a) It has factors 1, 2, 5, 10, 389, 778, 1945 and 3890
b) It has more than two factors
c) Divisible by 2
d) Both a and b
Ans: d) both a and b