Math - George has made a vow to jog for an average of one hour daily

George has made a vow to jog for an average of one hour daily five days a week. He cut his workout short on Wednesday by 40 minutes but was able to make up 20 minutes on Thursday and 13 minutes on Friday. How many minutes of jogging did George lose for the week? 

a. 20 minutes 

b. 13 minutes 

c. 7 minutes 

d. 3 minutes

Answer: c. 7 minutes 

This is a three-step problem involving multiplication, subtraction, and addition. First find out how many fewer minutes George jogged this week than usual: 5 hours × 60 minutes = 300 minutes − 40 minutes missed = 260 minutes jogged. Now add back the number of minutes George was able to make up: 260 minutes + 20 + 13 minutes = 293 minutes. Now subtract again: 300 minutes − 293 = 7 minutes jogging time lost.