Category Archives: Grade 10

[Soln] 2002 Moldova NMO Grade 10 Day 1 Problem 4

2002 Moldova NMO Gr 10 1.4. In each line and column of an table are written arbitrarily the numbers . It is stated that this configuration is symmetric with respect to the main diagonal of the table. Prove that all … Continue reading

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2002 Moldova NMO Grade 10 Day 1 Problem 4

2002 Moldova NMO Gr 10 1.4. In each line and column of an table are written arbitrarily the numbers . It is stated that this configuration is symmetric with respect to the main diagonal of the table. Prove that all the … Continue reading

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[Soln] 2015 AMC 10A Problem 12

2015 AMC 10A 12. Points and are distinct points on the graph of . What is ? (A) (B) (C) (D) (E)

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2015 AMC 10A Problem 12

2015 AMC 10A 12. Points and are distinct points on the graph of . What is ? (A)   (B)   (C)   (D)   (E)

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2015 AMC 10A Quick Reactions

The 2015 American Mathematics Competition (AMC) 10A was held on 3 Feb 2015. The full list of problem can be found at this link. Here are my quick reactions to the problems as I worked through them. Many of them … Continue reading

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[Soln] 2014 Singapore MO (Senior Rd 1) Problem 23

2014 SMO (Senior-Rd1) 23. Let be a positive integer, and let and . It is given that . Find the value of .

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[Hints] 2014 Singapore MO (Senior Rd 1) Problem 23

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