Answer:
1. Bob has used a colour coding system from resistor colour codes to send a secret PIN number to Alice. Can you determine the PIN code from:
Colour codes are: 0 - Black; 1 - Brown; 2 - Red; 3 - Orange; 4 - Yellow; 5 - Green; 6 - Blue; 7 - Violet; 8 - Grey; 9 - White
Ans: 31943299