Working systematically

There are 604 NRICH Mathematical resources connected to Working systematically
Seeing Parallelograms
problem
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Seeing parallelograms

Age
7 to 11
Challenge level
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Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

Parallelogram It
problem
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Parallelogram it

Age
11 to 16
Challenge level
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Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

5 by 5 Mathdokus
problem
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5 by 5 mathdokus

Age
7 to 16
Challenge level
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Can you use the clues to complete these 5 by 5 Mathematical Sudokus?
4 by 4 Mathdokus
problem
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4 by 4 mathdokus

Age
7 to 14
Challenge level
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Can you use the clues to complete these 4 by 4 Mathematical Sudokus?
Are you well Balanced?
problem
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Are you well balanced?

Age
5 to 7
Challenge level
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Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.
Fruity Pairs
problem
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Fruity pairs

Age
5 to 7
Challenge level
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Which two items of fruit could Kate and Sam choose? Can you order the prices from lowest to highest?

The Number Jumbler
problem
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The number jumbler

Age
7 to 14
Challenge level
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The Number Jumbler can always work out your chosen symbol. Can you work out how?
Tables Teaser
problem
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Tables teaser

Age
5 to 7
Challenge level
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How will you work out which numbers have been used to create this multiplication square?
Different Deductions
problem
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Different deductions

Age
7 to 11
Challenge level
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There are lots of different methods to find out what the shapes are worth - how many can you find?

Fruity Totals
problem
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Fruity totals

Age
7 to 16
Challenge level
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In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?