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Civil Service Commission Professional or Sub-Professional Reviewer - Page 82/159

Mathematics Test III Solution - Page 82

6. If water tank can be filled 1 and 3/4 hours. What part of the tank can be filled in exactly 1 hour?

The part of the tank that can be filled in 1 hour is 1 + 1 and 3/4

= 1 ÷  7 
          4

= 1 x  4 
          7

=  4  *Ans.
    7

7. If 5 items cost d dollars how much would x items cost at the same rate?

The cost of x items =  d x
                                  5

                              =  dx  *Ans.
                                   5

8. In a group of 8, 000 applicants for a civil service examination, 1600 failed to take the first part of the test. What percent of the total applicants took the first part of the test?

Rate =  8000 - 1600  x 100%
                 8000

        =  6400  x 100%
            8000

        = 0.8 x 100%

        = 80% *Ans.

9. If the ratio a : b is 11 : 9, then a + b is ________?

The sum of a and b can't be determined from the given information because there are infinite possibilities for this like;

a + b = 11 + 9
         = 22 + 18
         = 33 + 27 and so on...

d. can't be determined from the given information. *Ans.

Civil Service Reviewer Post 82/159