Working systematically

problem

Medal Muddle

Age

11 to 14

Challenge level

1 out of 3

Countries from across the world competed in a sports tournament. Can you devise an efficient strategy to work out the order in which they finished?
problem

Cayley

Age

11 to 14

Challenge level

1 out of 3

The letters in the following addition sum represent the digits 1 ... 9. If A=3 and D=2, what number is represented by "CAYLEY"?
problem

Football Crazy Hockey Mad

Age

11 to 14

Challenge level

1 out of 3

In a league of 5 football teams which play in a round robin tournament show that it is possible for all five teams to be league leaders.
problem

Satnav Dilemma

Age

11 to 14

Challenge level

1 out of 3

How many routes are there in this diagram from S to T?
problem

Negative Dice

Age

11 to 14

Challenge level

1 out of 3

If the odd numbers on two dice are made negative, which of the totals cannot be achieved?
problem

Nine, Ten and One

Age

11 to 14

Challenge level

1 out of 3

Can you find the value of t in these equations?
problem

Multiply the Addition Square

Age

11 to 14

Challenge level

1 out of 3

If you take a three by three square on a 1-10 addition square and multiply the diagonally opposite numbers together, what is the difference between these products. Why?
problem

Making 11p

Age

11 to 14

Challenge level

1 out of 3

How many ways are there to make 11p using 1p, 2p and 5p coins?
problem

Fly Away

Age

11 to 14

Challenge level

1 out of 3

Can you work out the values of the digits in this addition sum?
problem

Flag-Tastic

Age

11 to 14

Challenge level

1 out of 3

How many different flags can you make?