On the Subject of Technical Buttons
It’s like normal buttons but... more complicated. Wait a minute that sounds like something else. How about it’s like normal buttons but... more technical. Yes I like that.
- There are 8 buttons around the outside. Each button is coloured.
- There are 4 LEDs in the centre. Each LED can either be off, blue, or red.
- Use the venn diagram below to deduce which of the tables on the page should be used.
Exactly one blue LED | |
Exactly one red LED | |
1 or more D-type batteries | |
Sum of numbers in serial number is even |