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Civil Service Commission Professional or Sub-Professional Reviewer - Page 70/159

Mathematics Test II Solution - Page 70

6. What time will it be 3 and 1/2 hours after 7:15 PM?

= 7:15 + 3:30

= 10: 45 PM *Ans.

7. What time was it 3 and 1/2 hours before 7:15 AM?

7:15 - 3:30

Since :15 minutes (7:15) is less than :30 minutes (3:30) you need to borrow an hour to 7 and convert that to minutes. 1 hour = 60 minutes. Now :15 + :60 = 75 minutes.

7:15 is now 6:75

6:75 - 3:30 = 3:45 AM *Ans.

8. The fraction 52 / 91 expressed in lowest term is _____?

 52  =  52  /  13 
 91      91  /  13

       =  4  *Ans.
           7

9. Car A averages 8 km per liter of fuel. Car B averages 12 km per liter of fuel. If the price of fuel is $10 per liter. How much less would a 600 - km. trip cost for Car A than for Car B?

CAR A :

 600 km  x $10          =     $750
  8 km

CAR B :


 600 km  x $10          =     $500
  12 km

$750 - $500 = $250 *Ans.

Civil Service Reviewer Post 70/159