Home of real teaching & learning
  • Full support for teachers
  • Focus on critical thinking
  • Engaging classroom activities
  • Integrated student eBook
  • Assessed tasks / qBank
  • Practice exam questions

The InThinking Guarantee: Our sites are written by expert practitioners and not by AI

See our AI policy

Disclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.

Don't miss out, find out!

P.o.t.W. #18

■ No GDC ■ for SL and HL students Alicia collects autographs of well-known people. She keeps the autographs in three different boxes. One-fifth of her autographs are in box #1, several sevenths are in box #2, and there are 303 autographs in box #3. How many autographs does Alicia have in her collection? PDF: P.o.t.W. #18

Help