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Three digits get together for brunch and discuss their relationships
The digits from zero to nine are competitors in a new reality TV show. Which digit will win?
Prove that there is no two digit number which is the product of its digits
There are infinitely many angles between 0 and 90 degrees for which sine and cosine values are both rational. Create a proof.
Use a proof by induction to predict the value of the sum of the first n perfect squares.
Prove by contradiction that the harmonic mean of two positive numbers lies between the two numbers
Describe the next picture in the sequence of pictures shown in the problem
Show that the trig identity given is true for all non-negative integers n.
 
 

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