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Tuesday, March 5, 2013

Civil Service Commission Professional or Sub-Professional Reviewer - Page 90/159

Mathematics Test III Solution - Page 90

39. What part of gallon is 7 pints, given that 1 quart = 2 pints, 4 quarts = 1 gal. ?

therefore, 8 pints = 1 gal.

7 pints = 7 pints x  1 gal
                            8 pints

= 7 / 8 gallon * Ans.

40. If 7 is added to four times a number, the result is 91. What is the number ?

Let x - be the number.

4x + 7 = 91
       4x = 91 - 7
       4x = 84
         x = 84 / 4
         x = 21 * Ans.

41. The area of a square is 36 sq. cm. What is the perimeter of the square ?

A = s2
36 =  s2
        _____
s = √ 36

s = 6 cm.

P = 4s
   = 4 (6 cm.)
   = 24 cm. * Ans.

42. A truck can carry a load of 8 / 9 tons. How many trips must the truck make to deliver 10 and 2 / 3 tons of sand?

Let N - be the number of trips.

N = 10 ⅔ ÷ 8/9

    =  32  ÷  
         3       9

    =  32  x  9 
         3       8

    = 12 trips * Ans.

Civil Service Reviewer Post 90/159