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Civil Service Commission Professional or Sub-Professional Reviewer - Page 86/159

Mathematics Test III Solution - Page 86

22. If a car can travel 60 km on 12 liters of gasoline, how many liters will be needed in a 210 km trip ?

This is a direct proportion problem, Let x - be the number of liters needed.

x : 210 = 12 : 60

60x = 210 (12)

60x = 2520

x = 2520 / 60

x = 42 liters *Ans.

23. Write 7.5% as a fraction.

7.5% =  7.5 
             100

          =  75 
             100

          =  3  *Ans.
             40

24. Write 3/8 % as decimal.

3/8 % = 0.375 %

          = 0.00375 *Ans.

25. Find 40% of 60.

= 0.40 x 60

= 24 *Ans.

Civil Service Reviewer Post 86/159