K12 Math Puzzles
A gardener laying out another bed of roses planted 10 rosebushes in 5 straight
lines with 4 bushes in each line.
How did she do it?
5 sticks of uncooked spaghetti and 10 pennies
or 5 toothpicks and 10 Cheerios or other flat breakfast cereal
or whatever other manipulative is handy to simulate the lines and rosebushes
- Place 10 "rosebushes" on your desk or table.
- Using the 5 sticks experiment with arranging the "bushes" into 5 lines
of 4 each.
Questions to ask yourself as you work:
- If there are 4 bushes on each of the 5 lines and the lines are parallel, how
many bushes would there be in all?
- Since that would be 20 bushes and you only have 10 bushes to place, can the lines
Check for understanding
- When you place 4 rosebushes on one of the lines, how many bushes do you have
- How many rosebushes are toward the inside, and how many are toward the outside?
(Don't look 'til you're ready to give up!)
* Thanks to Christine Heffernan, who sent this question to
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