GATE Computer Science (CS) 2017 Shift 1 Solved Paper

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Question : 31 of 65
 
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Consider the Karnaugh map given below. Where X represents “don’t care” and blank represents 0.

Assume for all inputs (a, b, c, d), the respective complements (a̅, b̅, c̅, d̅) are also available. The above logic is implemented using 2-input NOR gates only. The minimum number of gates required is ________.
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