Question
30, 39, 66, ? , 174,
255 What should come in place of the question mark (?) in the following number series?Solution
30 + 9 × 1 = 39 39 + 9 × 3 = 66 66 + 9 × 5 = 111 111 + 9 × 7 = 174 174 + 9 × 9 = 255
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13   7   8   13.5   29    ?    228
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What will come in place of '?' in the given expression?
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