Concepts addressed: systems of equations, date calculation.Recommended grade: 8th.Difficulty level: Basic.An advanced version of Witty sister is also available. Scenario: You’re visiting your friend at their house, and are soon approached by their little sister. She’s recently taken to riddles, and she can’t wait to tell you her recent one.  With a grin on her

Equations – Witty sister (basic)Read More »

This scenario tests basic arithmetic, quadratic formula and date calculation.Recommended grade: 8th.Difficulty level: Basic.A basic version of Witty sister is also available. Scenario: You’re visiting your friend at their house and are soon approached by their little sister. She’s recently taken to riddles, and she can’t wait to tell you her most recent one. With

Equations – Witty sister (advanced)Read More »