Numbers in a table follow a consistent row and column rule. Which number correctly replaces the question mark? [ZH]

24 — The rule for each row is: column 3 = (column 1 x column 2) - 12. Row 1: (4 x 8) - 12 = 32 - 12 = 20. Row 2: (9 x 3) - 12 = 27 - 12 = 15. Row 3: (6 x 6) - 12 = 36 - 12 = 24. The missing number is 24.

Number SequencesMedium

3x3 Number Grid: Find the Missing Number (中文)

A 3x3 grid shows rows 4,8,20 and 9,3,15 and 6,6,?. Find the rule and the missing value.

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