तीक्ष्ण के

107       157       194       ?       237       247

2.5          1.25        1.25        1.875      3.75        ?

In a 7-term number series, all the terms are in arithmetic progression.

The 3rd term of the series is 17 and the 6th term is 32.

24   12   18   ?   157.5   708.75   3,898.125

32      48      96     ?     720     2520

What will come in place of the question mark (?) in the following series?

168, 120, ?, 48, 24, 8

10, 94, 115, 138, 163, ?

What will come in place of (?) in the following number series problems? 

90, 84, 120, 113, 162,  ?,  218 

16, 20, 11, 27, ?, 38