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1 . The wrong number of the sequence 4, 9, 25, 49, 121, 144 is –
A.  144
B.  121
C.  49
D.  4
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2 . ABCD is a rhombus. A straight line through C cuts AD produced at P and AB produced at Q. If DP = $1\over2$ AB, then the ratio of the lengths of BQ and AB is –
A.  2:1
B.  1:2
C.  1:1
D.  3:1
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3 .
A.  115°
B.  110°
C.  105°
D.  120°
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4 . The difference of the areas of two squares drawn on two line segments of different lengths is 32 sq.cm. Find the length of the greater line segment if one is longer than the other by 2 cm.
A.  7 cm
B.  9 cm
C.  11 cm
D.  16 cm
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5 . If the radius of a cone is 21 cm, then find the difference of curved surface area and total surface area.
(A) 441 π $cm^2$
(B) 1386 π $cm^2$
(C) 21 π $cm^2$
(D) cann't be determined
A.  a
B.  b
C.  c
D.  d
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6 . A circle is inscribed in a square whose length of the diagonal is $12\sqrt2$ cm. An equilateral triangle is inscribed in that circle. The length of the side of the triangle i s
(A) $4\sqrt3$cm
(B) $8\sqrt3$cm
(C) $6\sqrt3$ cm
(D)$11\sqrt3$cm
A.  a
B.  b
C.  c
D.  d