IMPORTANT NUMBER SERIES WITH SOLUTION FOR SSC,SBI,IBPS,UPSC,SSC CGL,CIVIL SERVICE EXAMS (SECTION 2)

The number series will be asked for 5 to 10 marks most of the competitive examinations like SSC, SBI, IBPS, UPSC, SSC CGL, CIVIL SERVICE EXAMS just go through the below given series.

This section will be asked for 5 marks in all competitive exams click here for section 1

1. 1 , 3 , 1 , 2.5 , 5 , 1 , 4 , 5 , 4 , 8 , 7 ?                          (ans 9.5)

(1+3+1=5 and 5/2=2.5,

5+1+4=10 and 10/2=5,

similarly 4+8+7=19 and 19/2=9.5 is the Ans )

2. 4 , 3 , 144 , 1.5 , 2 , 9 , 3.2 , 2 ?                               (ans 40.96)

(4*3=12 and 12^2=144,

1.5*2=3 and 3^2=9,

similarly 3.2*2=6.4 and 6.4^2=40.96 is the Ans )

3. 4.2 ,7.2 ,11.4 ,6.1 , 9.1 , 15.2 ,3.8 , 6.8 ?                    (ans 10.6)

( 4.2+7.2=11.4,

6.1+9.1=15.2,

similarly 3.8+6.8=10.6 is the Ans )

4. 5, 1, 2, 8, 8, 1, 0, 9, 9, 2, 3 ?                               (ans 14 )

(5+1+2=8,

8+1+0=9,

similarly 9+2+3=14 is the Ans)

5. 5, 1, 2, 8, 1, 0, 9, 2, 3, 14, 1, 3 ?                            (ans 18)

(5+1+2=8,

8+1+0=9,

9+2+3=14,

similarly 14+1+3=18 is the Ans)

6. 6, 3, 3, 9, 12, 5, 7, 35, 8, 6, 2 ?                     (ans 12)

(3+3=6 and 3*3=9,

5+7=12 and 7*5=35,

similarly 6+2=8 and 6*2= 12 is the Ans)

7. 24, 42, 1/2, 2, 65, 56, 1 1/5, 5/6, 73, 37 ?           (ans 7/3)

(step1: 24 next reverse the number is 42 , take number 24 and do like this 2/4=1/2 are same, next inverse of 1/2 is 2

step2: 65 next reverse the number is 56 , take number 65 and do like this 6/5=1 1/5 are same, next inverse of 6/5 is 5/6

step2: 73 next reverse the number is 37 , take number 73 and do like this 7/3 are same so 7/3 is the Ans)

8. 4, 2, 5, 9, 5, 11, 13, 7, 16, 17, 9 ?                    (ans 21)

( 5-4=1,

11-9=2,

16-13=3,

similarly 21-17=4 so next number is 21

here diff b/w the numbers increasing )

9. 8, 16, 3, 27, 4, 8, 7, 19, 2, 0, 7 ?                     (ans 9)

( 8+16+3=27,

4+8+7=19,

similarly 2+0+7=9 is the Ans )

10. 100, 98, 95, 90, 83 ?                                        (ans 72)

(100-98=2,

98-95=3,

95-90=5,

90-83=7

so here diff is increasing next diff should be 11 so Ans must be 72

i.e 83-72=11 )

11. 0, 8, 12, 26, 23 ?                                    (ans 1)

(add 0+12+23=35

similarly 8+26+x=35 so x must be 1 is the Ans)

12. 7.2, 2.2, 3.2, 16, 11, 12, 60, 55, 56 ?          (ans 280)

( 7.2-2.2=5, 2.2+1=3.2, 5*3.2=16,

16-11=5, 11+1=12, 12*5=60,

60-55=5, 55+1=56, 56*5=280 )

13. 7, -14, -4, 15, -30, -20, -21, ?                         (ans 42)

( 7*-2=-14, -14+10=-4,

15*-2=-30, -30+10=-20,

similarly -21*-2=42 is next number)

14. 340,680,1428,3141.6 ?                        (ans 7225.68)

(340*2=680,

680*2.1=1428,

1428*2.2=3141.6,

3141.6*2.3=7225.68 is the Ans )

15. 9, 3, 6, 21, 9, 12, 33, 15, ?                      (ans 18)

(9-3=6,

21-9=12,

33-15=18 is the Ans)

16. 1, 2, 3, 6, 11, 20, 37, 68, ?                       (ans 125)

( 1+2=3,

2+3+6=11,

3+6+11=20,

6+11+20=37,

11+20+37=68,

20+37+68=125 is the Ans)

17. 1.8, 3, 0.6, 2.5, 5, 0.5, 3.4, 2, 1.7 , 4.8, 6, ?       (ans 0.8)

(1.8/3=0.6,

2.5/5=0.5,

3.4/2=1.7,

4.8/6=0.8 is the Ans)

18. 3, 4.5, 7, 4, 6, 5.5, 5, 7.5, 10, 6, ?                 (ans 9 )

(3+1.5=4.5 leave number 7,

4+2=6 leave number 5.5,

5+2.5=7.5 leave number 10,

6+3=9 is the next Number)

19. 56, 89, 33, 21, 57, 88, 35, 19, 60, 85, 39, ?         (ans 15 )

(group like this (56, 89, 33,21) (57,88,35,19) (60,85,39,?)

56+1=57 and 89-1=88,

33+2=35 and 21-2=19,

57+3=60 and 88-3=85,

similarly 35+4=39 and 19-4=15 is the Ans )

20. 38, 36, 76, 35, 114, 34 ?                               (ans 152)

(38+36=74+2=76,

76+35=111+3=114,

114+34=148+4=152 is the Ans)

21. 3, 2, 1, 4, 5, 4, 5, 1, 0, 6, 3, ?                       (ans 2)

( 3, 4, 5, 6 increasing,

2-1=1,

5-4=1,

1-0=1,

3-2=1 so Ans is 2 )

22. 22, 19.5, 21.45, 33, 30.5, 33.55, 44, 41.5, ?  (ans 45.65)

( break the series like (22,33,44) (19.5,30.5,41.5) (21.45,33.55, ?),

33-22=11 and 44-33=11,

30.5-19.5=11 and 41.5-30.5=11,

similarly 33.55-21.45=12.10 and x-33.55=12.10 so x value must be 45.65 is the Ans)

23. 9, 4, 16, 6, 36, 21, 441, ?                    (ans 421)

(9-4=5,

16-6=10,

36-21=15,

5 is added to the dif every where 441-x=20 so x must be 421 is the Ans )

24. 33, 8, 41, 46, 21, 67, 72, 47, 119, 124,?              (ans 99)

(33-25=8 and 41+5=46,

46-25=21 and 67+5=72,

72-25=47 and 119+5=124,

124-25=99 is the next number)

25. 48, 24, 35, 7, 16, 8, 75, 15, 80, ?                    (ans 40)

( 24*2=48 and 7*5=35,

8*2=16 and 15*7=75,

same way 40*2=80 so Ans is 40 )

26. 11.5, 17.5, 35.5, 89.5, ?                   (ans 251)

( 11.5+6=17.5,

17.5+(6*3)=35.5,

35.5+(18*3)=89.5

same way 89.5+(54*3)=251 is the Ans )

27. 3, 7, 6, 5, 9, 3, 12, 1, 15, ?                          (ans -1)

( here to section 3+3=6, 6+3=9, 9+3=12, 12+3=15,

7-2=5, 5-2=3, 3-2=1, 1-2=-1 is the Ans )

28. 1, 8, 27, 64, 125, 216,, ?                     (ans 343)

( cube root series of 1,2,3,4,5,6 next number is 343 )

29. 15, 31, 63, 127, 255, ?                           (ans 511)

( (15*2)+1=31,

(31*2)+1=32,

(63*2)+1=127,

(127*2)+1=255,

similarly (255*2)+1=511 is the Ans )

30. 5, 10, 13, 26, 29, 58, 61, ?         (ans 122)

( 5*2=10 and 10+3=13,

13*2=26 and 26+3=29,

29*2=58 and 58+3=61,

61*2=122 is the Ans )