67
As 6+0+3=9 then 603 can be divided by 9 then it's a composite number
No. 603 is divisible by 3. 603 divided by 3 is actually 201, making 603 a composite number.(If the sum of all the digits in a number is divisible by 3, the number is divisible by 3. In this case, 6+0+3=9, and since 9 is divisible by 3 so is 603. )
86.1429
603
603
100.5
603
86.1429
603 / 9 = 67
86.1429
150.75