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Math I like it! The Math Detective Agency - 20 Secret Missions for Kids Ages 9–12 [Paperback] Rockabilly the BRIO World High SpeedTHIS IS NOT ANOTHER MATH WORKBOOK. The Math Detective Agency is a secret math adventure book designed for kids ages 912, blending spy thriller elements with challenging mathematical enrichment. Recruits join Professor Zero of CIPHER to recover the stolen Codex from General Minus across 20 secret missions. This book focuses on teaching mental math shortcuts, secret codes, number tricks, hidden patterns in nature, and famous number mysteries that are