List of top Mathematics Questions on sequences asked in AMUEEE

If $ log_{10}2, log_{10}(2^x-1) $ and $ log_{10}(2^x+3) $ are in $AP$, then $x$ =

The interior angles of a polygon are in arithmetic progression. The smallest angle is $ 120 $ and the common difference is $ 5 $ . The number of sides of the polygon is