Difficulty distribution
How the classified questions are distributed by difficulty.
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Practice Permutations, Combinations and Series - General Aptitude - General Aptitude (GA) previous year questions organised from real papers, with year-wise coverage and clear topic navigation.
Every graph below is calculated only from this selection.
Year-wise coverage for Permutations, Combinations and Series. Each bar uses a separate theme-derived color.
How the classified questions are distributed by difficulty.
MCQ, numerical, multiple-select and other formats found in these papers.
Top subjects by unique question coverage.
Top topics across the included previous year papers.
Top subtopics inside this exact selection.
Question coverage for the most populated papers. Every active PYP paper remains listed below.
Newest papers appear first. Sort by year, question coverage or name.
| Paper | Year / session | Questions in this view | Open |
|---|---|---|---|
| Biotechnology (BT) 2026 | 2026 | 1 | View paper |
| Biotechnology (BT) 2017 | 2017 | 1 | View paper |
| Biotechnology (BT) 2015 | 2015 | 3 | View paper |
Practice every matching question in batches of 20, with every available option.
How many different protein sequences of 100 residues can be generated using 20 standard amino acids?
There are 3 Indians and 3 Chinese in a group of 6 people. How many subgroups of this group can we choose so that every subgroup has at least one Indian?