Free Valentine's Day Math Activities You'll Love A school hosts a Valentine's day event where students can send carnations, cards or cookies to each other. 1. If each carnation costs $2.25 and Matthew has $17.35, how many carnations can he buy? A. 5 carnations B. 6 carnations C. 7 carnations D. 8 carnations 2. Ms. Flores is in charge of baking the cookies for the Valentines day event.