How do you work out the code for the fridge in the basement?
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How do you work out the code for the fridge in the basement?
They don't explain the whole puzzle:
469 - 346 = 123
366 - 132 = 234
589 - 244 = 345
??? - 111 = ???
The difference between the results of subtraction is always 111: 234 -123 = 111, 345 - 234= 111... etc. so, add 111 to 345 = 456, now you have:
??? -111 = 456 ie 456+111= 567
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