Number series solving strategies – UGC NET Question

Statements A, B and D capture standard strategies for solving number series. A is correct because equal or regularly changing differences suggest arithmetic patterns. B is correct since regular ratios point towards geometric or multiplicative patterns. D is true because many advanced series have two or more interwoven subsequences. Statements C and E are false; series may change rules mid-way and writing differences or ratios is often very useful, so the correct combination is A, B and D only.

Option A:
Option A is correct because it includes precisely the three statements that describe genuine number series techniques while excluding C and E, which are misleading. It reflects how candidates are expected to analyse series using differences, ratios and recognition of alternating patterns.

Option B:
Option B is incorrect because it adds C, which wrongly insists on a single unchanging rule for every exam series. Including C makes the combination too restrictive and not true for many NET-style questions.

Option C:
Option C is wrong since it introduces E along with A, B and D. Statement E claims that writing differences or ratios is never useful, which contradicts common problem-solving practice, so this option cannot be fully correct.

Option D:
Option D is incorrect because it omits A and includes E. By leaving out the basic difference method and accepting the false claim that working out differences is useless, it fails to represent the correct set of statements.