Is 1255 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 1255 is composite or not first we have to find its factors.
Contents
Factors of 1255:
- If we have taken numbers from 1, 2, 3…for checking factors of 1255, we found that 1255 has factors 1, 5, 251 and 1255. Hence, we must say that 1255 is a composite number.
- Thus, 1255 is the composite number.
- If we multiply 1255 by 1, 2, 3 then we get the multiples of 1255 which are 1255, 2510 and so on.
1255 is a Composite number or Prime number
About the number 1255:
- 1255 has more than two factors which are 1, 5, 251 and 1255 and hence it is the composite number.
- 1255 is the odd composite number and it is not the perfect square also.
- If we divide 1255 by 1, 5, 251 and 1255 then we get remainder as zero. Hence, 1, 5, 251 and 1255 are the factors of 1255
Note:
- 1255 is not the perfect square.
- Factors of 1255: 1, 5, 251 and 1255
- Prime factors of 1255: 5, 251
Conclusion:
- 1255 is the composite number which has factors 1, 5, 251 and 1255.
- And hence, 1255 is not the prime number.
Multiple Choice Questions:
1) 1255 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1255 are
a) 1
b) 5, 251
c) 1 and 1255
d) 1, 5, 251 and 1255
Ans: b) 1 and 1255
3) 1255 is the odd composite number because
a) It has factors 1, 5, 251 and 1255
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all