NUMBER SERIES FOR ALL COMPETITIVE EXAM 14 JANUARY 2017

NUMBER SERIES QUESTION FOR IBPS/SBI PO/CLERK, LIC, SSC GD, RRB BANK, RRB AND ALL OTHER EXAM.

NUMBER SERIES

1.   13,  17,  23,  ?

Solution-  129 , series of prime number.

2.   199,  191,  ?,  179,  163

Solution-  181 , series of prime number.

3.   ?,  440,  483,  528,  575

Solution –  399,

20² – 1 = 399,  21² – 1 = 440…..

4.   2,024,  ?,  624,  224,  24

Solution- 1,224

45² – 1 = 2,024,  35² – 1 = 1,224, 25² – 1 =624….

5.   28,  126,  344,  1,332,  ?

Solution- 2,198

1 subtract from Cube of prime number

3³ – 1 = 28, 5³ – 1= 126…..13³ – 1 = 2,198

6.  2,184,  4,896,  6,840,  ?,  24,360

Solution- 12,144

13³ – 13 = 2,184, 17³ – 17 =4,896….23³ – 23 = 12,144

7.   1,331, ?,  2,197,  2,744,  3,375

Solution-  1,728

11³, 12³…

8.  50,  250,  1,250,  ?,  31,250

Solution- 6,250

10 × 5 = 50, 50 × 5 = 250….1,250 × 5 = 6,250

9.   8,  20,  50,  ?,  312.5

Solution- 125

8 × 5/2 = 20….50 × 5/2 = 125

10.   300,  275,  250,  225,  ?

Solution-  200

300 – 25 =275,275 – 25=250…225 – 25 =200

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