1089 and All That: A Journey into Mathematics

“1089 + all that” is about maths in real life, how to use maths, fundamental units such as e, π, ph, etc. It mainly talks about how maths gets confusing in life, and also contains conundrums and paradoxes. One of my favourite parts of the book was when he showed an amazing math trick. SPOILER ALERT! So, right down any 3-digit number so long as the 1st digit and the 3rd digit have a difference of more then one. Now reverse your number. Then, subtract the smaller number from the bigger number. This is your new number. Now, reverse the new number. Now add the reversed new number with the original new number. Let’s call this secret value a mystery number. Is this mystery number 1089? Well, this book rating is 1089! For “mathy” people.