Nov 12, 2025 Pythagoras' theorem Nov 12, 2025 Parallelograms Nov 11, 2025 Polygons Nov 07, 2025 MOPSS, 8th November 2025 Oct 23, 2025 MOPSS, 25th October 2025 Oct 16, 2025 MOPSS, 18th October 2025 Oct 10, 2025 Warm up Oct 10, 2025 Quadratic reciprocity Oct 10, 2025 Infinite descent Oct 09, 2025 MOPSS, 11th October 2025 Oct 09, 2025 Lifting the exponent Sep 25, 2025 MOPSS, 27th September 2025 Aug 22, 2025 MOPSS, 23rd August 2025 Aug 07, 2025 MOPSS, 9th August 2025 Jul 18, 2025 MOPSS, 19th July 2025 Jul 05, 2025 MOPSS, 5th July 2025 Jun 02, 2025 Orders Jun 02, 2025 Gauss's lemma Apr 20, 2025 Chinese remainder theorem Apr 17, 2025 Primes, divisors and congruences Apr 16, 2025 System of equations Apr 09, 2025 Binomial coefficients Apr 07, 2025 Quadratic polynomials Apr 07, 2025 Using identities Apr 07, 2025 Induction Apr 07, 2025 Cubic polynomials Apr 04, 2025 Telescoping Apr 03, 2025 Functions Apr 03, 2025 Inequalities Mar 24, 2025 System of equations Mar 17, 2025 Integer divisibility Mar 17, 2025 Lagrange interpolation Mar 17, 2025 Crossing the $$ x $$-axis Mar 09, 2025 Complex numbers Mar 08, 2025 Roots of unity Mar 07, 2025 Size of the roots Mar 06, 2025 Finite differences Mar 06, 2025 Differentiation and multiple roots Mar 05, 2025 Viete's relations Feb 25, 2025 Generating functions Feb 24, 2025 Counting in two different ways Feb 23, 2025 Counting the complement Feb 22, 2025 Counting via bijections Feb 21, 2025 Counting Feb 20, 2025 Grouping in pairs Feb 20, 2025 Arrange in order Feb 19, 2025 Extremal principle Feb 18, 2025 Pigeonhole principle Feb 17, 2025 Invariance Feb 16, 2025 Inclusion-exclusion principle Feb 15, 2025 Induction Feb 14, 2025 Auxiliary configuration Jan 10, 2025 INMOTC 2025 (MP region), Algebra