Addition and subtraction

problem
Five more coins

Age

7 to 11

Challenge level

Could Ben have any amount of money between 5p and £2 in his pocket if he has five coins?
problem
Diagonal in a spiral

Age

7 to 11

Challenge level

Investigate the totals you get when adding numbers in threes on the diagonal of this pattern.
problem
What distance?

Age

7 to 11

Challenge level

Can you use addition and subtraction to answer these questions about real-life distances?
game

Asteroid blast

Age

7 to 11

Challenge level

A game for 2 people. Use your skills of addition, subtraction, multiplication and division to blast the asteroids.
problem
Worms

Age

7 to 11

Challenge level

Place this "worm" on the 100 square and find the total of the four squares it covers. Keeping its head in the same place, what other totals can you make?
problem
Roll these dice

Age

7 to 11

Challenge level

Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possible answers?
problem
Dice and spinner numbers

Age

7 to 11

Challenge level

If you had any number of ordinary dice, what are the possible ways of making their totals 6? What would the product of the dice be each time?
problem
Bean bags for Bernard's bag

Age

7 to 11

Challenge level

How could you put eight beanbags in the hoops so that there are four in the blue hoop, five in the red and six in the yellow? Can you find all the ways of doing this?
problem
Magic constants

Age

7 to 11

Challenge level

In a Magic Square all the rows, columns and diagonals add to the 'Magic Constant'. How would you change the magic constant of this square?
problem
Maze 100

Age

7 to 11

Challenge level

Can you go through this maze so that the numbers you pass add to exactly 100?