1 . What should come in place of question mark (?) in the following number series?
8, 52 , ? ,1287 ,4504.5 ,11261.25 ,16891.875
A.  462
B.  286
C.  194
D.  328
E.  None of these
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2 . What should come in place of question mark (?) in the following number series?
3, 42 ,504 ,? ,40320 ,241920,967680
A.  6048
B.  5544
C.  4536
D.  5040
E.  None of these
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3 . What should come in place of question mark (?) in the following number series?
403, 400 ,394 ,382 ,358,310 ,?
A.  244
B.  210
C.  214
D.  256
E.  None of these
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4 . What should come in place of question mark (?) in the following number series?
7, 8 ,4 ,13,-3 ,22 ,?
A.  - 7
B.  - 10
C.  - 12
D.  - 14
E.  None of these
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5 . What should come in place of question mark (?) in the following number series?
250000, 62500 ,12500,3125 ,625 ,?,31.25
A.  156.25
B.  172.25
C.  125
D.  150
E.  None of these
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6 . What should come in place of the question mark (?) in the following questions?
68% of 320 + 30 ÷ 0.8 = ?
A.  254.4
B.  258.2
C.  260.2
D.  252.7
E.  255.1
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7 . What should come in place of the question mark (?) in the following questions?
$\sqrt {?}$ $\div$ 8 $\times$ 31 = 127.5 - 3.5
A.  1158
B.  784
C.  578
D.  1024
E.  484
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8 . What should come in place of the question mark (?) in the following questions?
$\sqrt {{2 \over 5} \times 950 - ?}$ = 19
A.  17
B.  21
C.  23
D.  19
E.  11
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9 . What should come in place of the question mark (?) in the following questions?
(396 $\div$ 16.5 + $?^3$) $\div$ 20 = 7$9 \over 20$
A.  4
B.  5
C.  8
D.  2
E.  3
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10 . What should come in place of the question mark (?) in the following questions?
$?^2$ $\times$ 8 - 250 = 398
A.  6
B.  14
C.  12
D.  3
E.  9
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