Is 281 is a prime 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 281 is prime or not first we have to find its factors.
Factors of 281:
- If we have taken numbers from 1, 2, 3…for checking factors of 281, we found that 281 has factors 1 and the number 281 itself. Hence, we must say that 281 is a prime number.
- Thus, 281 is the prime number.
- Here, 281 is the odd prime number.
- If we multiply 281 by 1, 2, 3, then we get the multiples of 281 which are 281, 562, 843…and so on.
Contents
About the number 281:
- 281has only two factors which are 1 and the number itself and hence 281 is the prime number.
- 281is the odd prime number and it is not the perfect square also.
- If we divide 281 by 1 and the number itself then we get remainder as zero. Hence, 1 and 281 are the factors of 281.
Note:
- 281 is not the perfect square.
- Factors of 281: 1 and 281
- Prime factors of 281: 281 (since, 281 is the only one prime number which is the factor of 281.)
Conclusion:
- 281is the prime number which has factors 1 and 281.
- And hence, 281 is the prime number.
Multiple Choice Questions:
1) 281 is a
a) odd number
b) Prime number
c) Composite number
d) Both a and b
Ans: d) both a and b
2) The prime factors of a prime number 281 are
a) 1
b) 281
c) Both a and b
d) 0
Ans: b) 281
3) 1 is the not prime factor of 281 because
a) It is the prime number
b) 1 is neither prime nor composite number
c) Both a and b
d) Given statement is false
Ans: b) 1 is neither prime nor composite number