Nine display panels need 27 identical bolts. At the same number of bolts per panel, how many bolts do 14 panels need? Enter the number of bolts.
Bonne réponse
42
Explication
Each panel needs 27 divided by 9, or 3 bolts, so 14 panels need 42 bolts. Adding the increase of five panels directly to 27 would give 32, but that ignores the three-bolt requirement for every added panel.