MathsJEE Main 2 Apr 2026, Shift 2·Q7·MCQ·Easy–moderate

Permutations & Combinations · Triangles from polygon vertices

Let

p_n

denote the total number of triangles formed by joining the vertices of an

n

-sided regular polygon. If

p_{n+1} - p_n = 66

, then the sum of all distinct prime divisors of

n

is:

We corrected a printing error in the original paper

Source printed “an $n$ -side regular polygon”.

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