Live Problems - Stage 3, 4 & 5
Each time students visit the NRICH site there will be some activities which are 'live'. That means we are inviting students to send us their solutions and we will publish a selection of them, along with their name and school's name. If you'd like to know more about what we're looking for, read this short article.
The last day for sending in solutions to these live problems is Monday 11th July.
Age 11 to 16
Challenge Level
Age 14 to 16
Challenge Level
Age 14 to 16
Challenge Level
Age 11 to 18
Challenge Level
Solve the equations to identify the clue numbers in this Sudoku problem.
Age 14 to 16
Challenge Level
Can you find the percentage increase if the results appear in code?
Age 14 to 18
Challenge Level
Five equations and five unknowns. Is there an easy way to find the unknown values?
Age 14 to 18
Challenge Level
Find all the triples of numbers a, b, c such that each one of them plus the product of the other two is always 2.
Age 16 to 18
Challenge Level
What do you get when you raise a quadratic to the power of a quadratic?
Age 16 to 18
Challenge Level
Observe symmetries and engage the power of substitution to solve complicated equations.
Age 16 to 18
Challenge Level
Can you solve the system of equations to find the values of x, y and z?
Age 11 to 18
Challenge Level
These secondary problems have not yet been solved. Can you be the first?