Ganit Koyda

This document is the Gujarati book "Ganit Koyda" (Mathematical Puzzles) by Dhirajlal Tokarshi Shah, published by Navbharat Sahitya Mandir. The book contains 182 mathematical puzzles designed to engage and challenge the reader's intellect.

Key aspects of the book and its content:

• Author and Legacy: Dhirajlal Tokarshi Shah, also known as Shatavadhani Panditi Dhirajlal Tokarshi Shah, was a renowned scholar and polymath, particularly known for his "Avadhan" performances (a form of intellectual showmanship). The book draws upon his deep interest in mathematics and his ability to present complex ideas in an engaging manner. The preface highlights his earlier successful publications of puzzle collections for students, which were recognized by educational departments.
• Nature of the Puzzles: The puzzles cover a wide range of mathematical concepts and problem-solving techniques. They are presented in a riddle-like format, often with a narrative or a playful context. The puzzles involve:
  • Arithmetic and Number Theory: Puzzles dealing with addition, subtraction, multiplication, division, divisibility, number properties, palindromic numbers, prime numbers, etc. (e.g., puzzles involving finding numbers based on given conditions, sums, or products).
  • Algebraic Thinking: Problems that require setting up equations or using logical deduction to find unknown quantities, often related to ages, quantities, or costs.
  • Geometry: Puzzles involving counting shapes, spatial reasoning, or arrangements of objects.
  • Logic and Lateral Thinking: Many puzzles require thinking outside the box, employing creative solutions, or carefully interpreting the wording.
  • Combinatorics and Probability (implied): Some puzzles might touch upon arrangements or chances, though not explicitly in advanced terms.
  • Historical and Cultural Context: Some puzzles are framed within traditional Indian contexts, referencing historical figures, ancient practices, or classic literature (like Shamal Bhatt's riddles).
• Presentation: The book is structured as a numbered list of puzzles, starting from puzzle (1) and going up to (182). Each puzzle is concisely stated, often with a brief introductory sentence to set the scene. The solutions are provided at the end of the book.
• Publisher and Editions: The book was published by Navbharat Sahitya Mandir, with addresses in Mumbai and Ahmedabad. The copyright notice indicates that all rights are reserved by the author, and translation into other languages requires prior permission. The first reprinting was in November 1993.
• Purpose and Philosophy: The preface emphasizes that while mathematics is often considered difficult, it is also filled with humor and mystery. The book aims to reveal the secrets behind mathematical "miracles" performed by the author and to make mathematical exploration accessible and enjoyable for everyone. The publisher expresses a desire to publish more such knowledge-illuminating books if the publication receives public support.

In essence, "Ganit Koyda" is a comprehensive collection of mathematical puzzles designed to stimulate logical thinking, numerical fluency, and creative problem-solving, presented in an accessible and engaging Gujarati format by a respected scholar.