Is 3820 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 3820 is composite or not first we have to find its factors.
Contents
Factors of 3820:
- If we have taken numbers from 1, 2, 3…for checking factors of 3820, we found that 3820 has factors 1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910 and 3820. Hence, we must say that 3820 is a composite number.
- Thus, 3820 is the composite number.
- If we multiply 3820 by 1, 2, 3 then we get the multiples of 3820 which are 3820, 7640 and so on.
About the number 3820:
- 3820 has more than two factors which are 1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910 and 3820 and hence it is the composite number.
- 3820 is the even composite number and it is not the perfect square also.
- If we divide 3820 by, 1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910 and 3820 then we get remainder as zero. Hence, 1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910 and 3820 are the factors of 3820.
Note:
- 3820 is not the perfect square.
- Factors of 3820: 1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910 and 3820
- Prime factors of 3820: 2, 5, 191
Conclusion:
- 3820 is the composite number which has factors, 1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910 and 3820
- And hence, 3820 is not the prime number.
Multiple Choice Questions:
1) 3820 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 3820 are
a) 3820
b) 2, 5, 191
c) 4, 10, 20, 382, 764, 955, 1910 and 3820
d) 1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910 and 3820
Ans: c) 4, 10, 20, 382, 764, 955, 1910 and 3820
3) 3820 is composite number because
a) It has factors 1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910 and 3820
b) It has more than two factors
c) Divisible by 2
d) Both a and b
Ans: d) both a and b