Problem of the Week - Lower Elementary - March 28, 2021 to April 3, 2021

Lower Elementary: 

Question: It takes 5 batteries to power 1 flashlight. It takes 4 batteries to power 1 radio. Which of the following requires more batteries: 3 flashlights and 2 radios or 4 flashlights and 1 radio? 

Answer: 4 flashlights and 1 radio

Solution: For the first option: 3 flashlights use 5+5+5 = 15 batteries, and 2 radios use 4+4 = 8 batteries. That is 15 + 8 = 23 batteries in total. For the second option: 4 flashlights use 5+5+5+5 = 20 batteries, and 1 radio uses 4 batteries. That is 24 batteries in total. Since 24 is more than 23, the second option requires more batteries.