How to Become a Human Calculator

Useful for School students, teachers, and professionals and a must for those appearing for competitive exams like UPSC, MBA, MCA, GMAT, GRE, CSAT, etc. “After reading this book, solving 5378942639 ÷ 8120594263, finding the square of 99975, the cube root of 704969 or calculating any day from 500 years would be child’s play