JEE Main Maths · Permutations and Combinations
Number of Triangles from Points
Number of Triangles from Points (Permutations and Combinations) was asked 3 times in 3 JEE Main shifts, 2021–2026, out of the 42 shifts Lumi analysed.
- Times asked
- 3
- in 3 shifts
- Years
- 2021–2026
- Usual format
- Single correct
- Multi-step
- Pattern
- Frequent
- repeats across shifts
How it is asked
- Count triangles from polygon vertices
- Count polygons from vertices then ellipse eccentricity
Difficulty
Easy 1Medium 2Hard 0
Where it sits
Chapter: Permutations and Combinations. Topic: Permutations and Combinations, 50 questions over 22 ideas.
Other repeat ideas in this topic
Every time it came
All 3 questions
Newest first, each with its options and official answer.
- 2 Apr 2026, Shift 2 · Q7Let denote the total number of triangles formed by joining the vertices of an -side regular polygon. If ,…EasySingle correct
- 7 Apr 2025, Shift 2 · Q8Let be the number of all triangles that can be formed by joining the vertices of a regular polygon of sides and be the…MediumSingle correct
- 16 Mar 2021, Shift 2 · Q73Consider a rectangle ABCD having 5, 7, 6, 9 points in the interior of the line segments AB, CD, BC, DA respectively. Let be the…MediumSingle correct