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November 5, 2019
Number Theory, South Africa 2019, Problem 6

This problem in number theory is an elegant applciations of the modulo technique used in the diophantine equations. Try with our sequential hints

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November 5, 2019
AMC 10A Year 2005 Problem 21 Sequential Hints

American Mathematical Olympiard 10A Problem 21 Solutuon. The main idea here in this problem is to use some formulae of induction and finding factors.

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November 4, 2019
Number Theory, Korea Junior MO 2015, Problem 7

This problem in number theory is an elegant application of the ideas of the proof of infinitude of primes from Korea. Try with our sequential hints.

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November 3, 2019
Inequality, Israel MO 2018, Problem 3

This problem is a basic application of triangle inequality along with getting to manipulate the modulus function efficently. Try with our sequential hints.

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November 1, 2019
Number Theory, Greece MO 2019, Problem 3

This problem is a beautiful application of prime factorization theorem, and reveal how important it is. Try with our sequential hints.

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October 31, 2019
Algebra, Germany MO 2019, Problem 6

This problem is a beautiful application of algebraic manipulations, ideas of symmetry, and vieta's formula in polynomials. Try with our sequential hints.

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October 30, 2019
Geometry, Israel MO 2019, Problem 3

This problem is cute and intermediate application of the basic geometry principles. Try out this problem with our sequential hints.

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October 29, 2019
AMC 10A Year 2005 Problem 22 Sequential Hints

A beautiful problem form American Math Contest (AMC 10A) 2005, Problem 22 solution. Key idea here is to apply the greatest integer function.

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October 29, 2019
Combinatorics, Israel MO 2014, Problem 4

This is a bashing problem of combinatorics that will require the idea of patiently solving out the cases with intricate details and patience. Try with our sequential hints.

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October 29, 2019
AMC 10A Year 2006 Problems 21 Sequential Hints

A beautiful problem form American Math Contest (AMC 10A) 2006, Problem 21 solution. Key idea is to use basic calculation.

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