Posts in NRICH
AoPS: Resigned Resolutions
AoPS: Resigned Resolutions

Since I always fail my New Year's resolutions, this year, my New Year's resolutions are:

1. Make a new year's resolution
2. Fail my new year's resolution

Am I guaranteed to succeed? Guaranteed to fail? Something else?

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AoPS, Art of Problem Solving, Education, Maths, Maths Challenge, Maths Problem Solving, maths teachers, NRICH, Puzzle For The Day, School, Word ProblemsSarah NorrisLando EducationLando, Lando Education, mathematics, maths, maths challenge, maths puzzles, maths problem of the day, m, matg, maths problems, mathematical puzzles, mathematical puzzle, AoPS, Art of Problem Solving, resolutionComment
Nrich: Rhombuses
Nrich: Rhombuses

How many rhombuses made up of two adjacent small triangles are there?

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Education, Maths, Maths Challenge, Maths Problem Solving, Puzzle For The Day, School, Word Problems, NRICHSarah NorrisLando EducationAoPS, Art of Problem Solving, maths problem of the day, maths, Maths challnege, maths puzzles, mathematical puzzles, maths homework, mathematics, maths challenge, UK Maths Trust, school, UKMT, UKMT JMC, UKMT IMC, UKMT SMT, UKMT Olympiad, Olympiad, maths olympiad, maths training, Lando, Lando Education, tutoring, NRICHComment
Nrich: Fraction of a Square
Nrich: Fraction of a Square

What fraction of the square is shaded?

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Education, Maths, Maths Challenge, Maths Problem Solving, Puzzle For The Day, School, Word Problems, NRICHSarah NorrisLando EducationAoPS, Art of Problem Solving, maths problem of the day, maths, Maths challnege, maths puzzles, mathematical puzzles, maths homework, mathematics, maths challenge, UK Maths Trust, school, UKMT, UKMT JMC, UKMT IMC, UKMT SMT, UKMT Olympiad, Olympiad, maths olympiad, maths training, Lando, Lando Education, tutoring, NRICHComment
Nrich: Ten numbers = 37
Nrich: Ten numbers = 37

Can you pick ten numbers from the bags that add up to 37?

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Education, Maths, Maths Challenge, Maths Problem Solving, Puzzle For The Day, School, Word Problems, NRICHSarah NorrisLando EducationAoPS, Art of Problem Solving, maths problem of the day, maths, Maths challnege, maths puzzles, mathematical puzzles, maths homework, mathematics, maths challenge, UK Maths Trust, school, UKMT, UKMT JMC, UKMT IMC, UKMT SMT, UKMT Olympiad, Olympiad, maths olympiad, maths training, Lando, Lando Education, tutoring, NRICHComment
AoPS: Weird Equation
AoPS: Weird Equation

Let weird(n) be the number of ways to write n as a + a + b + c, where n, a, b, and c are distinct positive integers. Is weird(n) an increasing function?

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Education, Maths, Maths Challenge, Maths Problem Solving, maths teachers, NRICH, Art of Problem Solving, AoPS, Puzzle For The Day, School, Word ProblemsSarah NorrisLando EducationLando, Lando Education, mathematics, maths, maths challenge, maths puzzles, maths problem of the day, m, matg, maths problems, mathematical puzzles, mathematical puzzle, AoPS, Art of Problem Solving, weird mathsComment
NRICH: Shear Magic
NRICH: Shear Magic

Shearing is a transformation of a shape in which a particular line (in this case the base of the triangle or parallelogram) remains fixed and all other points in the shape are translated parallel to that line by an amount proportional to the distance from that line.

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NRICH, Education, Maths, Maths Challenge, Maths Problem Solving, Puzzle For The Day, School, Word ProblemsSarah NorrisLando EducationNRICH, shearing, shear magic, parallelograms, transformation, parallel, maths, mathematics, maths puzzles, maths problem of the day, maths problems, mathematical puzzle, mathematical puzzles, Lando, Lando EducationComment