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