problem
Favourite
Four Triangles Puzzle
Age
5 to 11
Challenge level
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?
problem
Favourite
Robot Monsters
Age
5 to 7
Challenge level
Use these head, body and leg pieces to make Robot Monsters which are different heights.
problem
Favourite
Inside Triangles
Age
5 to 7
Challenge level
How many different triangles can you draw on the dotty grid which each have one dot in the middle?
problem
Favourite
Rolling that cube
Age
5 to 11
Challenge level
My dice has inky marks on each face. Can you find the route it has taken? What does each face look like?
problem
Favourite
Mixed-up Socks
Age
5 to 7
Challenge level
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?
problem
Favourite
Find the Difference
Age
5 to 7
Challenge level
Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.
problem
Favourite
Which Scripts?
Age
7 to 11
Challenge level
There are six numbers written in five different scripts. Can you sort out which is which?
problem
Favourite
How many Times?
Age
7 to 11
Challenge level
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.?
problem
Favourite
Nine-Pin Triangles
Age
7 to 11
Challenge level
How many different triangles can you make on a circular pegboard that has nine pegs?
problem
Favourite
Reach 100
Age
7 to 11
Challenge level
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.
problem
Favourite
Factor Lines
Age
7 to 14
Challenge level
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
problem
Favourite
Got It
Age
7 to 14
Challenge level
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.
problem
Favourite
Make 37
Age
7 to 11
Challenge level
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?
problem
Favourite
Number Lines in Disguise
Age
7 to 14
Challenge level
Some of the numbers have fallen off Becky's number line. Can you figure out what they were?
problem
Favourite
Maze 100
Age
7 to 11
Challenge level
Can you go through this maze so that the numbers you pass add to exactly 100?
problem
Favourite
Two and Two
Age
7 to 16
Challenge level
How many solutions can you find to this sum? Each of the different letters stands for a different number.