Place the numbers 1, 2, 3,..., 9 one on each square of a 3 by 3 grid so that all the rows and columns add up to a prime number. How many different solutions can you find?
This article gives you a few ideas for understanding the Got It! game and how you might find a winning strategy.
What would you do if your teacher asked you add all the numbers from 1 to 100? Find out how Carl Gauss responded when he was asked to do just that.
from Fair Field Junior looked at the first row of grids in the
problem and said:
row of grids where you could only see the top of them, Rajeev
goes on to say that where the edges are not shown you can still
identify the tables:
we say about the relationship between the grid size and times table
in this first grid, I wonder?
wonder what else we can say about the last grid? Fantastic work,
Rajeev. You've explained your thinking very clearly.
Libby, Chloe-Anne and Becky from Maldon Primary School looked at
the patterns of tables on differently-sized grids. Chloe-Anne
think Becky is saying that when you create the pattern of the times
table that is the same as the size of the grid, you get a straight
line going downwards, or vertically. Well spotted!
Cresswell's Maths Group from Manor School, Didcot wrote:
to everyone who submitted solutions to this problem. There's so
much to explore here, isn't there?