Select the number that can replace the question mark (?) in the following series.
Pattern is
Difference of 63 and 82 = 19
                   82 and 102 = 20
                   102 and 123 = 21
           123 and 145 = 22Â
                    145 and 168 = 23
therefore the answer is 168Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
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