Working systematically

list
Being resourceful - Primary number

Age

5 to 11

Challenge level

Number problems at primary level that require careful consideration.
problem
River crossing

Age

11 to 18

Challenge level

There is nothing half so much worth doing as simply messing about in boats...
problem
Wipeout

Age

11 to 16

Challenge level

Can you do a little mathematical detective work to figure out which number has been wiped out?
problem
Perimeter challenge

Age

11 to 14

Challenge level

Can you deduce the perimeters of the shapes from the information given?
problem
Forwards add backwards

Age

11 to 14

Challenge level

What happens when you add a three digit number to its reverse?
problem
Add to 200

Age

11 to 14

Challenge level

By selecting digits for an addition grid, what targets can you make?
problem
Cryptarithms

Age

11 to 14

Challenge level

Can you crack these cryptarithms?
problem
Overlaps

Age

11 to 14

Challenge level

Can you find ways to put numbers in the overlaps so the rings have equal totals?
problem
Triangles in a square

Age

11 to 14

Challenge level

What are the possible areas of triangles drawn in a square?
game

First connect three for two

Age

7 to 11

Challenge level

First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.