Bojagi (Gr. 4-12)

Bojagi – Visual-reasoning math puzzles

Created by David Radcliffe, Bojagi combines multiplication with visual-reasoning skills on a grid to create interesting math puzzles. The directions are pretty straight forward:

“Draw a rectangle around each number by clicking and dragging with a mouse. Each rectangle should contain exactly one number, and the area of the rectangle should be the number that it contains. Rectangles must not overlap.”

Once you have completed the training puzzle, click on the List menu to access a growing list of user-generated puzzles, some of which are quite challenging. After you have acquired enough experience with the puzzles, click on the Create menu and try your hand at making one of your own!

INTEGRATION

  • Put a new spin on learning multiplication facts using this site.
  • Have students work in pairs to solve the same problem then compare their results to show that there may be more than one way to solve a problem.
  • Pair with an interactive whiteboard and have students solve one number at a time. Can they solve a number and still leave room for their peers to solve the remaining puzzle numbers?

Screen Shot 2015-11-24 at 9.34.39 AM

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