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 Detec...