11) - A family spends 20% of its monthly income on food, 23% on rent, and 42% on other expenses and saves the balance. If the family saves $360 per month, what is its monthly income?

 
A) $2,000    
B) $2,400    
C) $2,500    
D) $28,800    

12) - How many 4-inch by 8-inch bricks are needed to build a walk 6 feet wide and 24 feet long?

 
A) 1000    
B) 648    
C) 600    
D) 840    

13) - Each of the numbers below is a solution of the inequality 2x + 3 > 7 EXCEPT

 
A) 3    
B) 6    
C) 1    
D) 5    

14) - A room is 24 feet long, 18 feet wide, and 9 feet high. How many square yards of wallpaper are needed to paper the four walls of the room?

 
A) 84    
B) 72    
C) 756    
D) 96    

15) - The diameter of one bicycle wheel is 28 inches and its spokes run from the hub (or center) to the edge of the rim. The diameter of another bicycle wheel 21 inches. What is the difference in inches between the length of the spokes of the two wheels?

 
A) 12    
B) 4.5    
C) 7    
D) 3.5