Is 1485 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 1485 is composite or not first we have to find its factors.
Contents
Factors of 1485:
- If we have taken numbers from 1, 2, 3…for checking factors of 1485, we found that 1485 has factors 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485. Hence, we must say that 1485 is a composite number.
- Thus, 1485 is the composite number.
- If we multiply 1485 by 1, 2, 3 then we get the multiples of 1485 which are 1485, 2970 and so on.
1485 is a Composite number or Prime number
About the number 1485:
- 1485 has more than two factors which are 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485 and hence it is the composite number.
- 1485 is the odd composite number and it is not the perfect square also.
- If we divide 1485 by 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485 then we get remainder as zero. Hence, 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485 are the factors of 1485
Note:
- 1485 is not the perfect square.
- Factors of 1485: 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485
- Prime factors of 1485: 3, 5, 11
Conclusion:
- 1485 is the composite number which has factors 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485.
- And hence, 1485 is not the prime number.
Multiple Choice Questions:
1) 1485 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 1485 are
a) 1
b) 3, 5, 11
c) 1, 9, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485
d) 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485
Ans: b) 1, 9, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485
3) 1485 is the odd composite number because
a) It has factors 1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495 and 1485
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all