Is 2151 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 2151 is composite or not first we have to find its factors.
Contents
Factors of 2151:
- If we have taken numbers from 1, 2, 3…for checking factors of 2151, we found that 2151 has factors 1, 3, 9, 239, 717 and 2151. Hence, we must say that 2151 is a composite number.
- Thus, 2151 is the composite number.
- If we multiply 2151 by 1, 2, 3 then we get the multiples of 2151 which are 2151, 4302 and so on.
2151 is a Composite number or Prime number
About the number 2151:
- 2151 has more than two factors which are 1, 3, 9, 239, 717 and 2151 and hence it is the composite number.
- 2151 is the odd composite number and it is not the perfect square also.
- If we divide 2151 by 1, 3, 9, 239, 717 and 2151 then we get remainder as zero. Hence, 1, 3, 9, 239, 717 and 2151 are the factors of 2151
Note:
- 2151 is not the perfect square.
- Factors of 2151: 1, 3, 9, 239, 717 and 2151
- Prime factors of 2151: 3, 239
Conclusion:
- 2151 is the composite number which has factors 1, 3, 9, 239, 717 and 2151.
- And hence, 2151 is not the prime number.
Multiple Choice Questions:
1) 2151 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 2151 are
a) 1
b) 3, 239
c) 1 and 2151
d) 1, 3, 9, 239, 717 and 2151
Ans: b) 3, 239
3) 2151 is the composite number because
a) It has factors 1, 3, 9, 239, 717 and 2151
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