PRINTABLE POSTERS · KEEP THE CURIOSITY GOING

A little inspiration for your wall.

A real story, a question to chase, and something to try. Print at home, or save as a PDF.

DISCOVERY OF THE DAYAGES 7–9
Meet

Al-Khwarizmi

Say it: al-khwa-RIZ-mee

Al-Khwarizmi on a 1983 commemorative stamp.
Al-Khwarizmi on a 1983 commemorative stamp. From 1001 Inventions, printed page 84.

Their story. Your next idea.

Al-Khwarizmi was a mathematician who worked at the House of Wisdom in Baghdad. He wrote a book about solving equations. It showed how mathematics could help with everyday problems.

Lost Islamic History, p. 79 · Lost Islamic History, p. 77

algebraworking with numbers that may be unknown
equationa statement that two amounts are equal
unknownthe number you are trying to find
YOUR TURN · 10 MINUTES

Solve the mystery of the cups

Two paper cups and 11 counters. Use large paper squares for young children.

  1. Draw two identical cups, plus 3 counters, on one side of a page. Write 11 on the other side.
  2. Pretend each cup hides the same number. Remove 3 from both sides: 8 remain to share.
  3. Share those 8 equally between the two cups. How many belong in each?
  4. Check your answer: 4 + 4 + 3 = 11. Make a new mystery for someone else.
Let’s wonder

What everyday mystery could you solve with numbers?

My next question: __________________________________________________
Revival Studio · Seeking, learning, making.