Is 2421 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 2421 is composite or not first we have to find its factors.
Contents
Factors of 2421:
- If we have taken numbers from 1, 2, 3…for checking factors of 2421, we found that 2421 has factors 1, 3, 9, 269, 807 and 2421. Hence, we must say that 2421 is a composite number.
- Thus, 2421 is the composite number.
- If we multiply 2421 by 1, 2, 3 then we get the multiples of 2421 which are 2421, 4842 and so on.
2421 is a Composite number or Prime number
About the number 2421:
- 2421 has more than two factors which are 1, 3, 9, 269, 807 and 2421 and hence it is the composite number.
- 2421 is the odd composite number and it is not the perfect square also.
- If we divide 2421 by 1, 3, 9, 269, 807 and 2421 then we get remainder as zero. Hence, 1, 3, 9, 269, 807 and 2421 are the factors of 2421
Note:
- 2421 is not the perfect square.
- Factors of 2421: 1, 3, 9, 269, 807 and 2421
- Prime factors of 2421: 3, 269
Conclusion:
- 2421 is the composite number which has factors 1, 3, 9, 269, 807 and 2421.
- And hence, 2421 is not the prime number.
Multiple Choice Questions:
1) 2421 is a
a) odd number
b) Prime number
c) Composite number
d) Both a and c
Ans: d) both a and c
2) The prime factors of a composite number 2421 are
a) 1
b) 3, 269
c) 1 and 2421
d) 1, 3, 9, 269, 807 and 2421
Ans: b) 3, 269
3) 2421 is the composite number because
a) It has factors 1, 3, 9, 269, 807 and 2421
b) It has more than two factors
c) It is not divisible by 2
d) Both a and b
Ans: d) both a and b