# Is 320 is a Composite number

## Is 320 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 320 is composite or not first we have to find its factors.

### Factors of 320:

• If we have taken numbers from 1, 2, 3…for checking factors of 320, we found that 320 has factors 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320. Hence, we must say that 320 is a composite number.
• Thus, 320 is the composite umber.
• If we multiply 320 by 1, 2, 3 then we get the multiples of 320 which are 320, 640 and so on.

• 320 has more than two factors which are 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320 and hence it is the composite number.
• 320 is the even composite number and it is not the perfect square also.
• If we divide 320 by 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320 then we get remainder as zero. Hence,1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320 are the factors of 320.

### Note:

• 320 is not the perfect square.
• Factors of 320:1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320
• Prime factors of 320: 2, 5

### Conclusion:

• 320 is the composite number which has factors 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320
• And hence, 320 is not the prime number.

#### Multiple Choice Questions:

1) 320 is a

a) Prime number

b) Even number

c) Composite number

d) Both b and c

Ans: d) both b and c

2) The prime factors of a composite number 320 are

a) 2

b) 2, 5

c) 1, 4, 8, 10, 16, 20, 32, 40, 64, 80, 160

d) 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320

Ans: b) 2, 5

3) 320 is the even composite number as it has

a) Only two factors

b) It is divisible by 2

c) More than 2 factors

d) Both b and c

Ans: d) both b and c

Updated: December 3, 2021 — 4:43 pm