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Answers
1) The Baking Soda Warm-Up
The adult group record is 83 uses held by Hewlett Packard.
The school group record is 174 uses held by a 5th grade class in San Diego, CA.
The adult individual average is 13 uses.
My favorite submitted use was from a 10-year-old boy, "Mix the baking soda with vinegar. Gargle with it and pretend you have rabies on Halloween."
2) The Second Right Answer
Most people see the 16 individual squares first.
Then the big outside one (4x4 square).
Then nine more squares (2x2 squares).
Finally four more squares (3x3 squares).
For a total of thirty squares.
I was challenged by a nine year old that said there are even more than 30 since the squares are being viewed on a computer screen. The child saw the pixels, which are also square in shape. So based on your screen's resolution, there could be millions of squares in the graphic.
3) The Final Exam
Did you give up?
Did you challenge your right to left shifting of the digits?
What if you move the digits up or down?
Ah hah... exponentials.
The correct answer in the back of the textbook is:
Don't feel bad if you don't remember exponentials. That's why the test was called a final exam. It was the last time you needed to remember it.
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