This article introduces the idea of generic proof for younger children and illustrates how one example can offer a proof of a general result through unpacking its underlying structure.
How many possible necklaces can you find? And how do you know you've found them all?
EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.
This challenge encourages you to explore dividing a three-digit number by a single-digit number.
What happens when you add the digits of a number then multiply the
result by 2 and you keep doing this? You could try for different
numbers and different rules.
What happens when you add three numbers together? Will your answer be odd or even? How do you know?
This task combines spatial awareness with addition and multiplication.
Ram divided 15 pennies among four small bags. He could then pay any sum of money from 1p to 15p without opening any bag. How many pennies did Ram put in each bag?
Look at three 'next door neighbours' amongst the counting numbers. Add them together. What do you notice?
Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!
Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?
This challenge combines addition, multiplication, perseverance and even proof.
A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.
Four bags contain a large number of 1s, 3s, 5s and 7s. Pick any ten
numbers from the bags above so that their total is 37.