My grandson has a clock and the numbers are printed on various geometric shapes.
Which of the 12 shapes can not be flipped over and put back in the same place?
Solution to the Problem:
The only shape that cannot be put back is the paralleogram with the number 2 on it.James Alarie wrote:
1: has four lines of symmetry;
3: has three lines of symmetry;
4: has four lines of symmetry;
5: has five lines of symmetry;
6: has six lines of symmetry;
7: has two lines of symmetry;
8: has eight lines of symmetry;
9: has one line of symmetry;
10: has two lines of symmetry;
11: has two lines of symmetry;
12: has five lines of symmetry;
All of the above can be flipped and put back in place. Number 2 can not.
Correctly solved by:
| 1. James Alarie | Flint, Michigan |
| 2. Levi Hanney |
Mountain View High School, Mountain View, Wyoming |
| 3. Riley Dolezal |
Mountain View High School, Mountain View, Wyoming |
| 4. Michael Reilly | Silver Spring, Maryland |