Permutations with conditions

Question

Question 1: abc is a three digit integer that provides the following conditions condition 1 will cba > abc condition 2 abc will prime number condition 3 cba will prime number condition 4 ab will prime number condition 5 bc will prime number condition 6 cb will prime number condition 7 ba will prime number Write a c# working code to satisfy all Please help guys its urgent

Vulpes · Answer

Try this: using System; class Program { static void Main() { Console.WriteLine(The 3 digit integers which satisfy the conditions are:
); for(int i = 100; i { int[] d = GetDigits(i); int cba = d[2] * 100 + d[1] * 10 + d[0]; if ((cba int ab = d[0] * 10 + d[1]; if(!IsPrime(ab)) continue; int bc = d[1] * 10 + d[2]; if(!IsPrime(bc)) continue; int cb = d[2] * 10 + d[1]; if(!IsPrime(cb)) continue; int ba = d[1] * 10 + d[0]; if(!IsPrime(ba)) continue; Console.WriteLine(i); } Console.ReadKey(); } static bool IsPrime(int x) { if (x for (int i = 2; i { if ((x % i) == 0) { return false; } } return true; } static int[] GetDigits(int x) { int[] digits = new int[3]; digits[0] = x / 100; x = x % 100; digits[1] = x / 10; digits[2] = x % 10; return digits; } } The output is : The 3 digit integers which satisfy the conditions are: 113 179

Abiather Hore · Answer

thnx Vulpes it wrked