Is 2120 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 2120 is composite or not first we have to find its factors.
Contents
Factors of 2120:
- If we have taken numbers from 1, 2, 3…for checking factors of 2120, we found that 2120 has factors 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120. Hence, we must say that 2120 is a composite number.
- Thus, 2120 is the composite number.
- If we multiply 2120 by 1, 2, 3 then we get the multiples of 2120 which are 2120, 4240 and so on.
About the number 2120:
- 2120 has more than two factors which are 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120 and hence it is the composite number.
- 2120 is the even composite number and it is not the perfect square also.
- If we divide 2120 by, 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120 then we get remainder as zero. Hence, 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120 are the factors of 2120.
Note:
-
2120 is not the perfect square.
- Factors of 2120: 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120
- Prime factors of 2120: 2, 5, 53
Conclusion:
- 2120 is the composite number which has factors 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120
- And hence, 2120 is not the prime number.
Multiple Choice Questions:
1) 2120 is a
a) Prime number
b) Odd number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 2120 are
a) 2120
b) 2, 5, 53
c) 1, 4, 8, 10, 20, 40, 106, 212, 265, 424, 530, 1060 and 2120
d) 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120
Ans: c) 1, 4, 8, 10, 20, 40, 106, 212, 265, 424, 530, 1060 and 2120
3) 2120 is composite number because
a) It has factors 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120
b) It has only two factors
c) Divisible by 2
d) Both a and c
Ans: a) it has factors 1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060 and 2120