Is 1225 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 1225 is composite or not first we have to find its factors.
Contents
Factors of 1225:
- If we have taken numbers from 1, 2, 3…for checking factors of 1225, we found that 1225 has factors 1, 5, 7, 25, 35, 49, 175, 245 and 1225. Hence, we must say that 1225 is a composite number.
- Thus, 1225 is the composite number.
- If we multiply 1225 by 1, 2, 3 then we get the multiples of 1225 which are 1225, 2450 and so on.
1225 is a Composite number or Prime number
About the number 1225:
- 1225 has more than two factors which are 1, 5, 7, 25, 35, 49, 175, 245 and 1225 and hence it is the composite number.
- 1225 is the odd composite number and it is not the perfect square also.
- If we divide 1225 by 1, 5, 7, 25, 35, 49, 175, 245 and 1225 then we get remainder as zero. Hence, 1, 5, 7, 25, 35, 49, 175, 245 and 1225 are the factors of 1225
Note:
- 1225 is not the perfect square.
- Factors of 1225: 1, 5, 7, 25, 35, 49, 175, 245 and 1225
- Prime factors of 1225: 5, 7
Conclusion:
- 1225 is the composite number which has factors 1, 5, 7, 25, 35, 49, 175, 245 and 1225.
- And hence, 1225 is not the prime number.
Multiple Choice Questions:
1) 1225 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 1225 are
a) 1
b) 5, 7
c) 1, 25, 35, 49, 175, 245 and 1225
d) 1, 5, 7, 25, 35, 49, 175, 245 and 1225
Ans: b) 1, 25, 35, 49, 175, 245 and 1225
3) 1225 is the odd composite number because
a) It has factors 1, 5, 7, 25, 35, 49, 175, 245 and 1225
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all