Working systematically

problem
Different deductions

Age

7 to 11

Challenge level

There are lots of different methods to find out what the shapes are worth - how many can you find?
problem
Fruity totals

Age

7 to 16

Challenge level

In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?
problem
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
A4 fraction addition

Age

7 to 11

Challenge level

Try adding fractions using A4 paper.
problem
A4 fraction subtraction

Age

7 to 11

Challenge level

This task offers opportunities to subtract fractions using A4 paper.
problem
Possible pieces

Age

5 to 11

Challenge level

Can you create jigsaw pieces which are based on a square shape, with at least one peg and one hole?
$Guess \my Quad$

problem
Guess my quad

Age

11 to 14

Challenge level

How many questions do you need to identify my quadrilateral?
problem
Gabriel's problem

Age

11 to 14

Challenge level

Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?
problem
Multiplication table puzzle

Age

11 to 14

Challenge level

In the multiplication table on the right, only some of the numbers have been given. What is the value of A+B+C+D+E?
problem
Half and half

Age

11 to 14

Challenge level

Two of the four small triangles are to be painted black. In how many ways can this be done?