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ATQ,
Let the cost price of the article be Rs. '200z'
So, marked price = 200z * 1.5 = Rs. '300z'
So, selling price = 300z * 0.90 = Rs. '270z'
So, required gain percentage = {(270z - 200z)/200z} * 100 = 35%
168, 178, ?, 273, 400, 618, 963
16, 9, ?, 114.25, 750.625, 6396.3125
8, 12, 20, 32, 52, ?, 136
84, 97, ?, 162, 214, 279
8, 27, 53, ?, 161, 285
7, 8, 18, 57, 232, ?
196, 196, 203, 229, 292, ?
?, 15, 45, 225, 1575, 14175