Is 1425 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 1425 is composite or not first we have to find its factors.
Contents
Factors of 1425:
- If we have taken numbers from 1, 2, 3…for checking factors of 1425, we found that 1425 has factors 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475 and 1425. Hence, we must say that 1425 is a composite number.
- Thus, 1425 is the composite number.
- If we multiply 1425 by 1, 2, 3 then we get the multiples of 1425 which are 1425, 2850 and so on.
1425 is a Composite number or Prime number
About the number 1425:
- 1425 has more than two factors which are 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475 and 1425 and hence it is the composite number.
- 1425 is the odd composite number and it is not the perfect square also.
- If we divide 1425 by 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475 and 1425 then we get remainder as zero. Hence, 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475 and 1425 are the factors of 1425
Note:
- 1425 is not the perfect square.
- Factors of 1425: 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475 and 1425
- Prime factors of 1425: 3, 5, 19
Conclusion:
- 1425 is the composite number which has factors 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475 and 1425.
- And hence, 1425 is not the prime number.
Multiple Choice Questions:
1) 1425 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 1425 are
a) 1
b) 3, 5, 19
c) 1, 15, 25, 57, 75, 95, 285, 475 and 1425
d) 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475 and 1425
Ans: b) 1, 15, 25, 57, 75, 95, 285, 475 and 1425
3) 1425 is the odd composite number because
a) It has factors 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475 and 1425
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all