Consider this sequence of numbers: 5, 7, 9. Can you spot the pattern? Here’s another with the same pattern: 15, 19, 23. One more: 232, 235, 238. “Three equally spaced things,” says Raghu Meka, a ...
Everyone knows that arithmetic is true: 2 + 2 = 4. But surprisingly, we don't know why it's true. By stepping outside the box of our usual way of thinking about numbers, my colleagues and I have ...
Regarding arithmetic for junior high school entrance exams, I sometimes hear things like this.'You won't use things like the crane and turtle calculation once you enter junior high school.''Is there a ...
In certain math and physics topics, I encountered a lack of sufficient exercises for students to thoroughly master the material. This document contains enough exercises that can be used in a variety ...
Barbie caught a lot of flack back in the ’90s for declaring, “Math class is tough!” Today we find ourselves in the disorienting position of defending her. We recently got a note from an anonymous ...
Everyone knows that arithmetic is true: 2 + 2 = 4. But surprisingly, we don’t know why it’s true. By stepping outside the box of our usual way of thinking about numbers, my colleagues and I have ...
The material contains a total of 26 columns (A-Z) with 10 exercises for Arithmetic of square roots, including the solutions to these columns. It also includes all 26 columns (A-Z) with an enlarged ...
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