These two group activities use mathematical reasoning - one is
numerical, one geometric.
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.
Arrange three $1$s, three $2$s and three $3$s in this square so that every row, column and diagonal adds to the same total.
You might like to use this interactivity to do this problem.
Full screen version:
You may like to try this with other sets of three consecutive numbers (numbers which come one after the other).
This problem has been adapted from "Numbers in Your Head" by John Spooner, published by BEAM Education. It can be purchased for £9.50 plus VAT (and handling and delivery) by calling the BEAM orderline on 01242 267 287.