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A hint for "A Neat Trick"
\( 1+2+3= \frac{3 \times 4}{2}\)
\( 1+2+3+4= \frac{4 \times 5}{2}\)
\(1+2+3+4+5= \frac{5 \times 6}{2} \)
Do you see the pattern? Does it always work? Why?
The Math Profs
Books
Blog
Grids for Kids
Crack the Safe Series
Reviews
Authors