Four Triangles Puzzle
Cut four triangles from a square as shown in the picture. How many different shapes can you make by fitting the four triangles back together?
Robot Monsters
Inside Triangles
Rolling that cube
Mixed-up Socks
Make 37
Four bags contain a large number of 1s, 3s, 5s and 7s. Can you pick any ten numbers from the bags so that their total is 37?
Find the Difference
Factors and Multiples Game
A game in which players take it in turns to choose a number. Can you block your opponent?
Dicey Perimeter, Dicey Area
Which Scripts?
How many Times?
Nine-Pin Triangles
How many different triangles can you make on a circular pegboard that has nine pegs?
Maze 100
Reach 100
Choose four different digits from 1-9 and put one in each box so that the resulting four two-digit numbers add to a total of 100.
Factor Lines
Got It
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.
Number Lines in Disguise
Two and Two
How many solutions can you find to this sum? Each of the different letters stands for a different number.