Is 1515 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 1515 is composite or not first we have to find its factors.
Contents
Factors of 1515:
- If we have taken numbers from 1, 2, 3…for checking factors of 1515, we found that 1515 has factors 1, 3, 5, 15, 101, 303, 505 and 1515. Hence, we must say that 1515 is a composite number.
- Thus, 1515 is the composite number.
- If we multiply 1515 by 1, 2, 3 then we get the multiples of 1515 which are 1515, 3030 and so on.
1515 is a Composite number or Prime number
About the number 1515:
- 1515 has more than two factors which are 1, 3, 5, 15, 101, 303, 505 and 1515 and hence it is the composite number.
- 1515 is the odd composite number and it is not the perfect square also.
- If we divide 1515 by 1, 3, 5, 15, 101, 303, 505 and 1515 then we get remainder as zero. Hence, 1, 3, 5, 15, 101, 303, 505 and 1515 are the factors of 1515
Note:
- 1515 is not the perfect square.
- Factors of 1515: 1, 3, 5, 15, 101, 303, 505 and 1515
- Prime factors of 1515: 3, 5, 101
Conclusion:
- 1515 is the composite number which has factors 1, 3, 5, 15, 101, 303, 505 and 1515.
- And hence, 1515 is not the prime number.
Multiple Choice Questions:
1) 1515 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 1515 are
a) 1
b) 3, 5, 101
c) 1, 15, 303, 505 and 1515
d) 1, 3, 5, 15, 101, 303, 505 and 1515
Ans: b) 1, 15, 303, 505 and 1515
3) 1515 is the odd composite number because
a) It has factors 1, 3, 5, 15, 101, 303, 505 and 1515
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all