CAN YOU EXPLAIN ANY SHORTCUT METHOD (TRICK) IN SOLVING QUESTIONS ON CIRCUIT DIAGRAMS IN FINDING EQUIVALENT RESITANCE (SIMPLIFYING DIFFICULT MIXED COMBINATIONS OF RESISTORS IN CIRCUIT DIAGRAM)BECAUSE I AM FACING DIFFICULTY IN IDENTIFYING AND SIMPLIFYING RESISTORS IN SERIES AND PARAREL(BOTH TYPES IN SAME CIRCUIT)IN MIXED CIRCUIT DIAGRAM?

Solving mixed circuits is an easy problem to solve if we have a systematic approach to such kind of questions:

1) Remember the formula for the parallel and series equivalent resistance.

2) Identify the group of resistances connected in series or parallel.

3) Calculate each group of parallel or series resistances one by one.

4) Now the equivalent of those smaller groups of resistances might be again connected to the equivalent resistance of some other group of resistances in the same circuit.

Thus, check for more combinations of resistances and keep calculating one by one untill the entire circuit is has one final equivalent resistance.