Robot monsters
Use these head, body and leg pieces to make Robot Monsters which are different heights.
Inside triangles
How many different triangles can you draw which each have one dot in the middle?
Rolling that cube
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?
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
Mixed-up socks
Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair. Is there more than one way to do it?
How many times?
On a digital 24 hour clock, at certain times, all the digits are consecutive. How many times like this are there between midnight and 7 a.m.?
Nine-pin triangles
How many different triangles can you make on a circular pegboard that has nine pegs?
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?
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
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
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
Maze 100
Two and two
How many solutions can you find to this sum? Each of the different letters stands for a different number.