Is 425 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 425 is composite or not first we have to find its factors.
Contents
Factors of 425:
- If we have taken numbers from 1, 2, 3…for checking factors of 425, we found that 425 has factors 1, 5, 17, 25, 85 and 425. Hence, we must say that 425 is a composite number.
- Thus, 425 is the composite number.
- If we multiply 425 by 1, 2, 3 then we get the multiples of 425 which are 425, 850 and so on.
425 is a Composite number or Prime number
About the number 425:
- 425 has more than two factors which are 1, 5, 17, 25, 85 and 425 and hence it is the composite number.
- 425 is the odd composite number and it is not the perfect square also.
- If we divide 425 by 1, 5, 17, 25, 85 and 425 then we get remainder as zero. Hence, 1, 5, 17, 25, 85 and 425 are the factors of 425.
Note:
- 425 is not the perfect square.
- Factors of 425: 1, 5, 17, 25, 85 and 425
- Prime factors of 425: 5, 17
Conclusion:
- 425 is the composite number which has factors 1, 5, 17, 25, 85 and 425.
- And hence, 425 is not the prime number.
Multiple Choice Questions:
1) 425 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 425 are
a) 1
b) 5, 17
c) 1, 25, 85 and 425
d) 1, 5, 17, 25, 85 and 425
Ans: b) 5, 17
3) 425 is the odd composite number because
a) It has factors 1, 5, 17, 25, 85 and 425
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c