Collections for Secondary Students
Weekly Challenges
Age 14 to 18
Challenge Level 
The NRICH Stage 5 weekly challenges are shorter problems aimed at Post-16 students or enthusiastic younger students. There are 52 of them.
NRICH Starter Problem Selection
On this page we give a selection of good starter activities for those new to NRICH
Working Systematically
Age 11 to 16
Challenge Level
This collection of resources challenges you to work systematically.