Flip your digits!
We’ve added a new Digit Flipping Study Guide that shows how to solve digit flipping challenges with two-digit numbers.
These types of problems are challenging at first, but with practice you can become a pro. It can deepen your understanding of place value and working with systems of equations.
Recommended Reading
E: The Story of a Number
– Eli Maor
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Mathematical Puzzling
– A. Gardiner
Prime Obsession
– John Derbyshire
Things to Make and Do in the Fourth Dimension
– Matt Parker
Math Recess: Playful Learning in an Age of Disruption
– Sunil Singh
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Measurement
– Paul Lockhart
A History of Pi
– Petr Beckmann
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Elements
– Euclid
Euclid is the most celebrated mathematician of all time. He lived in the third or fourth century BCE. His fame rests mainly on the Elements, which he wrote in thirteen volumes establishing the foundations of mathematics.
Journey Through Genius
– William Dunham
What Is Mathematics?
– Courant and Robbins
