Tina ate one twice a day for 5 days so 2*5 = <<1*2*5=10>>10
Her husband at 1 per day for 5 days so 1*5 = <<1*5=5>>5
She made 24, ate 10, her husband ate 5 and the guests ate 4 so 24-10-5-4 = <<24-10-5-4=5>>5 brownies left
#### 5