exam Maths Puzzle Numerical Ability

This is a very long queation, and i have no idea of how to figure it out. I am totally confused on this. It is a long queation, and it is two parts.

part 1: find the loganthn

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exam Other Question

Solve the following 2 x 2 systems using substitutions
3x + y + 13
5x - y =3 The historical reports from two major networks showed that the mean number of commercials aired during prime time was equal for both networks last year. In order to find out whethe