Math Mysteries: The Triplet Threat

Math Mysteries: The Triplet Threat--where solving crimes means solving equations!
It's the first day of fourth grade at Arthimos Elementary, and things are already off to a strange start--poisonous cookies, a zipline disaster, a missing iPad, and what are those strange sounds coming from the school custodian's wheelbarrow? Luckily the Prime Detectives--Abby "the Abacus" Feldstein, Cameron "Cam" McGill, and Gabriel "Gabe" Kim--are on the case!

Using arithmetic, geometry, and logic, the Prime Detectives are sure to figure out who did what, when, and why! This page-turning mystery by author Aaron Starmer brims with lighthearted intrigue and essential middle-grade math skills that will have readers on the edge of their seats. Perfect for kids who love puzzles, riddles, brain teasers, and adventure stories! Each book in this gripping series contains multiple, interlinked mysteries that readers help solve using math. Includes answers showing step-by-step solutions--ideal for grades 4-8. Also from the MATH MYSTERIES series:
The Fall Festival Fiasco