In this puzzle, you are asked to count how many triangles you can find within the pentagonal structure. I had my mother do the exercise with me (my puzzle on the left, hers on the right). Although we did not find all 35 triangles that was stated in the solution page, we both did use similar strategies in counting off the triangles. We started with the tiny triangles that were more obvious. Then we used McKim's method of "finding," in which we tried to search for triangular designs that are concealed among the lines. This was challenging because a good portion of the triangles overlapped, creating a distraction when counting. We also tried using the method of rotation in which we scanned for triangles that are placed in various positions.
In this puzzle, you are asked to find the two umbrellas that are identical. With the color sequences shown, it was actually quite difficult to find the two matching umbrellas, and we both ended up not finding the correct pair. Again, both of our strategies were alike in that we went through the "long" way of matching. Because the color patterns look so similar, we went through a detail-by detail comparison and categorized according to similar patterns that we discovered. For example, if we picked up on a certain color sequence, we would try to match it with another umbrella that shared that very same feature. This pattern recognition was the main focus in trying to find the matching pair. Also, since there was a possibility of the umbrellas being rotated, we visualized a fixed image of an umbrella in a different position. This second method of "rotation" was challenging due to the fact that we had to find a color pattern first.
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