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22. What number should replace the question mark?
  iq test. Free iq test online # 2 with answers and solutions. Question # 22. What number should replace the question mark?
 

Explanation:
The number in the third row = (the number in the first row is multiplied by the number of the second row) minus 2 to the power of the column number. (28 = 5 × 6 - 2; 52 = 7 × 8 - 4; 34 = 6 × 7 - 8; 65 = 9 × 9 - 16).