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There are 6 NRICH Mathematical resources connected to NC-PropofNumbersFPSandC-R1-Y6, you may find related items under NC.
Broad Topics > NC > NC-PropofNumbersFPSandC-R1-Y6Which pairs of cogs let the coloured tooth touch every tooth on the other cog? Which pairs do not let this happen? Why?
Can you see how these factor-multiple chains work? Find the chain which contains the smallest possible numbers. How about the largest possible numbers?
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.
The planet of Vuvv has seven moons. Can you work out how long it is between each super-eclipse?
What happens if you join every second point on this circle? How about every third point? Try with different steps and see if you can predict what will happen.