I have read a bit about the book “Modern Approach to Speed Math Secret” By Vitthal Jadhav and it seems like a very good book on mental calculation. I have previewed a bit of it and the method it provides for squaring four-digit numbers is really quite nice. However, it seems like it might be a bit advanced for me. Can anyone who has it give me a recommendation on whether or not it would be suited for someone who is essentially a beginner to mental calculation?

I am also interested in how Pascal’s triangle can be used when calculating powers/roots. I have only known it to be useful for powers of 11, but it seems like it can be useful for other numbers like 1.01. Can someone explain this concept or point me to a book that does? Is it discussed in the Modern Approach?