{"product_id":"math-brain-puzzles-mathrax-puzzles-200-math-puzzles-with-answers-9781981029969","title":"Math Brain Puzzles: Mathrax Puzzles - 200 Math Puzzles With Answers","description":"\u003cp\u003e • Author(s): Ted Warner\u003cbr\u003e • Publisher: Independently Published\u003cbr\u003e • Publisher Imprint: Independently Published\u003cbr\u003e • BISAC: Logic \u0026amp; Brain Teasers\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eMathrax\u003c\/b\u003e consists of a square grid. The goal is to fill in each cell with numbers from 1 to N, where N is the size of the puzzle's side. No number may appear twice in any row or column. Circles with additional conditions may be situated on intersections of lines inside the grid; a circle may contain: - A number and a sign of mathematical operation (addition, subtraction, multiplication, division) - a number is a result of an operation execution with numbers in diagonally adjacent cells. - A letter \"E\" (\"even\") - all numbers in four cells are even. - A letter \"O\" (\"odd\") - all numbers in four cells are odd.\u003c\/p\u003e","brand":"Independently Published","offers":[{"title":"Paperback","offer_id":45545646882967,"sku":"9781981029969","price":921.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/3471\/1191\/files\/9781981029969.webp?v=1767125500","url":"https:\/\/atlanticbooks.com\/products\/math-brain-puzzles-mathrax-puzzles-200-math-puzzles-with-answers-9781981029969","provider":"Atlantic Books","version":"1.0","type":"link"}