Is 2020 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 2020 is composite or not first we have to find its factors.
Contents
Factors of 2020:
- If we have taken numbers from 1, 2, 3…for checking factors of 2020, we found that 2020 has factors 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020. Hence, we must say that 2020 is a composite number.
- Thus, 2020 is the composite number.
- If we multiply 2020 by 1, 2, 3 then we get the multiples of 2020 which are 2020, 4040 and so on.
About the number 2020:
- 2020 has more than two factors which are 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020 and hence it is the composite number.
- 2020 is the even composite number and it is not the perfect square also.
- If we divide 2020 by, 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020 then we get remainder as zero. Hence, 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020 are the factors of 2020.
Note:
- 2020 is not the perfect square.
- Factors of 2020: 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020
- Prime factors of 2020: 2, 5, 101
Conclusion:
- 2020 is the composite number which has factors 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020
- And hence, 2020 is not the prime number.
Multiple Choice Questions:
1) 2020 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 2020 are
a) 2020
b) 2, 5, 101
c) 1, 4, 10, 20, 202, 404, 505, 1010 and 2020
d) 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020
Ans: c) 1, 4, 10, 20, 202, 404, 505, 1010 and 2020
3) 2020 is composite number because
a) It has factors 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020
b) It has only two factors
c) Divisible by 2
d) Both a and c
Ans: a) it has factors 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010 and 2020