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11. What number should replace the question mark?
iq test. Fast and free online iq test # 1 with answers and solutions. Question # 11. What number should replace the question mark?

Explanation:
Inside the circle number subtracted, external number added, produces a number inside a triangle. (21 + 15 + 7 - 18 - 7 - 14 = 4; 29 + 3 + 17 - 23 - 7 - 16 = 3; 24 + 32 + 27 - 35 - 28 - 12 = 8).




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