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Monday, March 4, 2013

Civil Service Commission Professional or Sub-Professional Reviewer - Page 103/159

Mathematics Test IV Solution - Page 103

44. If x + y = 4a and x - y = 2b then y = ______ ?

x + y = 4a           ------->         x = 4a - y
x - y = 2b            ------->        x = 2b + y

x = x
2b + y = 4a - y
  y + y = 4a - 2b
      2y = 4a - 2b

      2y =  4a - 2b 
      2           2

        y = 4a - 2
                  2
        y = 2a - b * Ans.

45. If 0.37 m = 0.0111 then m = _____ ?

m =  0.0111 
         0.37

    =  11.1 
          37

   = 0.3 * Ans

46. If 1 / M = 4 and S = 2, what is S in terms of M ?

Since S = 2

4 =  1 
      M

2 (2) =  1 
            M

2 S   =  1 
            M

   S   =  1 
          2M    * Ans.

Civil Service Reviewer Post 103/159