Is 1520 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 1520 is composite or not first we have to find its factors.
Contents
Factors of 1520:
- If we have taken numbers from 1, 2, 3…for checking factors of 1520, we found that 1520 has factors 1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520. Hence, we must say that 1520 is a composite number.
- Thus, 1520 is the composite number.
- If we multiply 1520 by 1, 2, 3 then we get the multiples of 1520 which are 1520, 3040 and so on.
About the number 1520:
- 1520 has more than two factors which are 1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520 and hence it is the composite number.
- 1520 is the even composite number and it is not the perfect square also.
- If we divide 1520 by 1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520 then we get remainder as zero. Hence, 1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520 are the factors of 1520.
Note:
- 1520 is not the perfect square.
- Factors of 1520: 1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520
- Prime factors of 1520: 2, 5, 19
Conclusion:
- 1520 is the composite number which has factors1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520
- And hence, 1520 is not the prime number.
Multiple Choice Questions:
1) 1520 is a
a) Even number
b) Odd number
c) Composite number
d) Both a and c
Ans: d) both a and c
2) The prime factors of a composite number 1520 are
a) 1520
b) 2, 5, 19
c) 1, 4, 8, 10, 16, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520
d) 1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520
Ans: b) 2, 5, 19
3) 1520 is even composite number because
a) It has factors 1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760 and 1520
b) It has more than two factors
c) Divisible by 2
d) all
Ans: d) all