Q 1: Find the missing number: 18  ? = 9 Answer:

Q 2: Find the missing number: 12  ? = 1 Answer:

Q 3: Find the missing number: 20  ? = 4 Answer:

Q 4: Find the missing number: 12  ? = 9 Answer:

Q 5: Find the missing number: 17  ? = 6 Answer:

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