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NRICH Resources
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Mathdoku
Complete the Mathdoku grid using the clues. Can you convince us that the number you have chosen for each square has to be correct?
https://nrich.maths.org/2795
Tue, 04 Oct 2022 10:19:31 +0100

6 by 6 Mathdokus
Can you use the clues to complete these 6 by 6 Mathematical Sudokus?
https://nrich.maths.org/15108
Mon, 03 Oct 2022 15:51:48 +0100

5 by 5 Mathdokus
Can you use the clues to complete these 5 by 5 Mathematical Sudokus?
https://nrich.maths.org/15107
Mon, 03 Oct 2022 15:51:33 +0100

4 by 4 Mathdokus
Can you use the clues to complete these 4 by 4 Mathematical Sudokus?
https://nrich.maths.org/15106
Mon, 03 Oct 2022 15:51:18 +0100

3 by 3 Mathdokus
Can you use the clues to complete these 3 by 3 Mathematical Sudokus?
https://nrich.maths.org/15105
Mon, 03 Oct 2022 15:50:49 +0100

Poly Plug Rectangles
The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?
https://nrich.maths.org/polyplugrectangles
Mon, 03 Oct 2022 09:56:33 +0100

Sort the Street
Sort the houses in my street into different groups. Can you do it in any other ways?
https://nrich.maths.org/5157
Mon, 03 Oct 2022 09:54:25 +0100

Frogs
How many moves does it take to swap over some red and blue frogs? Do you have a method?
https://nrich.maths.org/1246
Sat, 01 Oct 2022 07:57:47 +0100

Treasure Hunt
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?
https://nrich.maths.org/6288
Sat, 01 Oct 2022 07:42:40 +0100

Olympic Starters
Look at some of the results from the Olympic Games in the past. How do you compare if you try some similar activities?
https://nrich.maths.org/8170
Fri, 30 Sep 2022 09:35:08 +0100

Chain of Changes
Arrange the shapes in a line so that you change either colour or shape in the next piece along. Can you find several ways to start with a blue triangle and end with a red circle?
https://nrich.maths.org/221
Fri, 30 Sep 2022 09:29:15 +0100

Just Touching
Three semicircles have a common diameter, each touches the other
two and two lie inside the biggest one. What is the radius of the
circle that touches all three semicircles?
https://nrich.maths.org/290
Sat, 24 Sep 2022 21:56:04 +0100

Break it Up!
In how many different ways can you break up a stick of seven interlocking cubes? Now try with a stick of eight cubes and a stick of six cubes. What do you notice?
https://nrich.maths.org/2284
Wed, 21 Sep 2022 10:30:31 +0100

Tetra Perp
Show that the edges AD and BC of a tetrahedron ABCD are mutually perpendicular when: AB²+CD² = AC²+BD².
https://nrich.maths.org/1963
Tue, 20 Sep 2022 14:59:29 +0100

Maths and the Spread of Infectious Diseases Session 4: the Ticket Conundrum
4th session under working title of Franklin
https://nrich.maths.org/15091
Thu, 15 Sep 2022 18:46:22 +0100