500
The quickest way to make one 1 out of 5 produce a result is this.
What is - If the possibilities are A, B, C, D, and E:
1. Combine A and B in an OR gate
2. Combine C and D in an OR gate
3. Combine the outputs of AB:OR and CD:OR into an OR gate.
4. Combine E and the output of AB:OR-CD:OR-OR into an OR gate.
5. Connect the output of (AB:OR-CD:OR-OR)(E)-OR to the result