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21.

If a binary operation ∗ is defined by x * y = x + 2y , find 2 * (3 * 4)

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A.

16

B.

14

C.

26

D.

24


22.

If P = 5321 and Q = 4235, find 2P + Q.

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A.

14877

B.

77814

C.

81477

D.

77148


23.

Find the inverse of 5364

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A.

2-32-352

B.

232-3-52

C.

232-352

D.

2-32-3-52


24. q-image

In the diagram above, find the value of x.

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A.

40º

B.

45º

C.

15º

D.

30º


25. q-image

The value of x in the figure above is

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A.

100º

B.

70º

C.

130º

D.

110º


26.

If the angles of a quadrilateral are (3y + 10)º , (2y + 30)º , (y + 20)º and 4yº , find the value of y.

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A.

42º

B.

66º

C.

12º

D.

30º


27.

A square tile has side 30cm. How many of these tiles will cover a rectangular floor of length 7.2m and width 4.2m?

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A.

576

B.

720

C.

336

D.

420


28.

Find the length of a chord which subtends an angle 90º at the centre whose radius is 8cm.

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A.

82cm

B.

83cm

C.

4 cm

D.

8 cm


29.

A chord of a circle subtends an angle 120º at the centre of a circle of diameter 43cm. Calculate the area of the major sector.

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A.

16π cm2

B.

32π cm2

C.

4π cm2

D.

8π cm2


30.
The locus of the points which is equidistant from the line PQ forms a
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A.
pair of parallel lines to PQ
B.
perpendicular line to PQ
C.
circle centre P
D.
circle centre Q.

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