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AccountMaker , 10 months ago (edited 10 months ago) But what about 14, 21 and 28? 14 - 4*2 = 6, not divisible by 7 21 - 1*2 = 19, not divisible by 7 28 - 8*2 = 12, not divisible by 7 Or did I misunderstand the algorithm? EDIT: I didn’t realize that you remove the last digit when subtracting, got corrected in the replies.
But what about 14, 21 and 28?
14 - 4*2 = 6, not divisible by 7
21 - 1*2 = 19, not divisible by 7
28 - 8*2 = 12, not divisible by 7
Or did I misunderstand the algorithm?
EDIT: I didn’t realize that you remove the last digit when subtracting, got corrected in the replies.