Logic gates. BCD Multiplication. Karnaugh maps (I think)

digital-logickarnaugh maplogic-gates

I have to draw minimum combination of logic gates that multiply any BCD number with a 7. Output is also in BCD. It probably has something to do with Karnaugh maps, that's how we do this sort of problems in class. I don't even know how to start.

Best Answer

Truth Table for BCD number which has to multiply by 7 and output too in BCD can be given as below

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K-Map can be given as enter image description here