Corveus sleeps 4 hours a day and his doctor recommended for him to sleep 6 hours a day. How many hours of sleep does Corveus lack in a week?
Corveus lacks 6 - 4 = <<6-4=2>>2 hours of sleep every day.
Therefore, Corveus' total hours of lack of sleep every week is 2 x 7 = <<2*7=14>>14.
#### 14