The Philistines returned the ark with gold models of tumors and rats. How many of each did they send?

Answer: Five

One for each Philistine ruler and city: Ashdod, Gaza, Ashkelon, Gath, and Ekron. (KJV: golden emerods and mice.)

““What guilt offering should we send back to Him?” asked the Philistines. “Five gold tumors and five gold rats,” they said, “according to the number of rulers of the Philistines, since the same plague has struck both you and your rulers.”— 1 Samuel 6:4 (BSB)