Being resilient

game
Favourite

Factors and Multiples Game

Age

7 to 16

Challenge level

1 out of 3

A game in which players take it in turns to choose a number. Can you block your opponent?
problem
Favourite

Two and Two

Age

7 to 16

Challenge level

3 out of 3

How many solutions can you find to this sum? Each of the different letters stands for a different number.
problem
Favourite

Climbing Complexity

Age

11 to 14

Challenge level

1 out of 3

In the 2020 Olympic Games, sport climbing was introduced for the first time, and something very interesting happened with the scoring system. Can you find out what was interesting about it?
problem
Favourite

American Billions

Age

11 to 14

Challenge level

1 out of 3

Play the divisibility game to create numbers in which the first two digits make a number divisible by 2, the first three digits make a number divisible by 3...
problem
Favourite

Frogs

Age

11 to 14

Challenge level

1 out of 3

How many moves does it take to swap over some red and blue frogs? Do you have a method?
problem
Favourite

Reflecting Squarely

Age

11 to 14

Challenge level

1 out of 3

In how many ways can you fit all three pieces together to make shapes with line symmetry?
problem
Favourite

Isosceles Triangles

Age

11 to 14

Challenge level

1 out of 3

Draw some isosceles triangles with an area of $9cm^2$ and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?
problem
Favourite

Odds and Evens

Age

11 to 14

Challenge level

1 out of 3

Are these games fair? How can you tell?
problem
Favourite

Substitution Cipher

Age

11 to 14

Challenge level

1 out of 3

Find the frequency distribution for ordinary English, and use it to help you crack the code.
problem
Favourite

M, M and M

Age

11 to 14

Challenge level

1 out of 3

If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?