Number Series
Direction: What should come in place of the question mark (?) in the following questions?
-  15, 25, 40, 65, ?, 195
 
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The series is x 2 - 5, x 2- 10, x - 15, x 2 - 20, x 2 - 25, .........
Correct Option: E
The series is x 2 - 5, x 2- 10, x - 15, x 2 - 20, x 2 - 25, .........
 
-  120, 320, ?, 2070, 5195, 13007.5
 
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x 2.5 + 20.
Correct Option: E
x 2.5 + 20.
 
-  What should come next in thje following number series?
9 7 5 3 1 1 8 6 4 2 2 9 7 5 3 1 8 6 4 2 2 9 7 5 3 1 8 6 4 9 7 5 
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9 7 5 3 1 1/ 8 6 4 2 2/ 9 7 5 3 1/ 8 6 4 2 2 / 9 7 5 3 1/ 8 6 4 2/ 9 7 5 3/ 8 6 4 2
Correct Option: C
9 7 5 3 1 1/ 8 6 4 2 2/ 9 7 5 3 1/ 8 6 4 2 2 / 9 7 5 3 1/ 8 6 4 2/ 9 7 5 3/ 8 6 4 2
 
-  435, 354, 282, 219, 165 ?
 
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The given series is -
(9 x 9), - (9 x 8), - (9 x 7), - (9 x 6), - (9 x 5)Correct Option: C
The given series is -
(9 x 9), - (9 x 8), - (9 x 7), - (9 x 6), - (9 x 5) 
-  4, 200, 369, 513, 634 ?
 
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The given series is
+ (14)2, + (13)2, + (12)2, + (11)2, + (10)2Correct Option: C
The given series is
+ (14)2, + (13)2, + (12)2, + (11)2, + (10)2