18. TEMPERATURES IN CITY Z ON DEC.31
    

    The average (arithmetic mean) of the temperatures shown in the table above is

    (A)    1⁰ above zero
    (B)    2⁰ above zero
    (C)    1⁰ below zero
    (D)    2⁰ below zero
    (E)    6⁰ above zero

19. If the length of a rectangle is 2x - 1 and its area is 6x - 3, which of the following must be its width ?

    (A)    4x - 2
    (B)    6
    (C)    3
    (D)    6x-3 ( 2x-1)
    (E)    1/3

20. 
    

    In the figure above AB // CD // EF find the value of a + b - c ?

    (A)    90
    (B)    180
    (C)    360
    (D)    none
    (E)    270

21. If the second number in a list of numbers is 14 and if each number after the first is 8 more than the number preceding it, what is the ninth number in the list ?

    (A)    70
    (B)    78
    (C)    62
    (D)    56
    (E)    none

22. 
    

The triangles shown above are similar triangles. If DK is four times XL, find area of D DEF. (Given the area of D XYZ = 8.)

(A)    512
(B)    32
(C)    16
(D)    128
(E)    none

23. A well 250 meters deep is drilled at the base of a mountain 1500 meters high. Its peak is 2200 meters above sea-level. How many meters above sea-level is the bottom of the well?

    (A)    1250
    (B)    450
    (C)    1950
    (D)    350
    (E)    700

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