Exploring and noticing

There are 412 NRICH Mathematical resources connected to Exploring and noticing
Wonky Watches
problem
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Wonky watches

Age
7 to 11
Challenge level
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Stuart's watch loses two minutes every hour. Adam's watch gains one minute every hour. Use the information to work out what time (the real time) they arrived at the airport.

Largest product
problem
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Largest product

Age
11 to 14
Challenge level
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Which set of numbers that add to 100 have the largest product?
Trebling
problem
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Trebling

Age
7 to 11
Challenge level
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Can you replace the letters with numbers? Is there only one solution in each case?
Ladybird Count
problem
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Ladybird count

Age
5 to 7
Challenge level
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Some children were playing a game. Make a graph or picture to show how many ladybirds each child had.

Real Statistics
problem
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Real statistics

Age
7 to 11
Challenge level
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Have a look at this table of how children travel to school. How does it compare with children in your class?

First Connect Three
problem
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First connect three

Age
7 to 11
Challenge level
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Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?
Venn diagrams
problem
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Venn diagrams

Age
5 to 11
Challenge level
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How will you complete these interactive Venn diagrams?

Shifting Times Tables
problem
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Shifting times tables

Age
11 to 14
Challenge level
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Can you find a way to identify times tables after they have been shifted up or down?

Charlie's delightful machine
problem
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Charlie's delightful machine

Age
11 to 16
Challenge level
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Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?