Logic is : (First number x 10) + (Second number x 5) = Third number. First row = (12 x 10) + (9 x 5) = 120 + 45 = 165 Second row = (14 x 10) + (10 x 5) = 140 + 50 = 190 Third row = (17 x 10) + (7 x 5) = 170 + 35 = 215
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