IBM
Company
Logical Reasoning
Number Series
IBM 100 series questions with answers:
1. 39,41,25,26,27,38,40,24,25,26,____ Answer:26
2. 4,2,4,8,6,8,16,____ Answer:14
3. 4,11,66,74,370,379,____ Answer:1516
4. 3,8,12,48,29,____ Answer:144
5. 4608,2304,576,288,72,____ Answer:36
6. 11,13,17,19,23,29,31,37,41,____ Answer:43
7. 0.8,1.8,3.6,3.6,4.6,9.2,9.2,10.2,____ Answer:20.4
8. 0,1,2,0.5,2,2,2,2,4,3,2,____ Answer:3.5
9. 1,3,3,2,8,10,3,4,12,4,8,____ Answer:12
10. 7,-14,-4,15,-30,-20,-21,-42,___ Answer:52
11. 3.2,4.2,4.7,2.7,6.2,1.2,7.7,-0.3,9.2,-1.8,___ Answer:10.7
12. 1/2,5/4,2,11/4,7/2,___ Answer:17/4
13. 2,9,5,49,11,169,____ Answer:17
14. 9,3,24,4,9,3,36,6,9,3,30,____ Answer:5
15. 2,12,30,56,90,____ Answer:132
16. 2,9,30,105,_____,2195 Answer:436
17. 2,5,9,1,5,10,3,8,____ Answer:14
18. 8,7,11,12,14,17,17,22,___ Answer:20
19. 33,8,4,46,21,____ Answer:17
20. 2,6,5,11,26,17,____ Answer:38
21. 1,46,163,388,757,_____ Answer:1306
22. 6,8,10,8,15,17,12,16,___ Answer:20
23. 11,8,17,14,23,24,31,32,___Answer:41
24. 1/4,1/4,1/2,3/2,6,____ Answer:30
25. 4.2,7.2,11.4,6.1,9.1,15.2,3.8,6.8,___ Answer:10.6
26. 5/6,1/3,1/2,1/2,2/8,1/4,5/6,1/6,2/3,1/2,1/3,____ Answer:1/6
27. 24,42,1/2,2,65,56,1 1/5,5/6,73,37,___ Answer:2 1/3
28. 2,1,2,3,2,9,9,0,1,1,9,____ Answer:1
29. 40,39,37,33,26,15,____ Answer:-1
30. 6,18,21,8,11,33,2,6,9,5,8,24,7,21,___ Answer:24
31. 9,15,26/3,29/2,25/3,14,8,27/2,23/3,___ Answer:13
32. 38,36,76,35,114,34,____ Answer:152
33. 4,4,5,6,8,11,16,24,_____ Answer:37
34. 10,12,-36,-7,-5,15,19,21,___Answer:-63
35. 9,3,6,21,9,12,33,15,18,____ Answer:45
36. 18,13,16,33,112,____ Answer:535
37. 4,3,8,4,24,13,60,____ Answer: 38
38. 42,12,40,2,62,____ Answer:13
39. 124,62,60,30,28,14,___ Answer:12
40. 8,8,10,18,44,124,____ Answer:366
41. 2,3,6,13,28,___ Answer:59
42. 2,9,23,79,415,____ Answer:3103
43. 4,64,1,1,3,27,2,___ Answer:8
44. 34,4,21,59,43,3,20,66,12,2,16,___ Answer:30
45. 0,1,1,1,1,2,1,3,3,1,___ Answer:5
46. 162,98,50,___ Answer:18
47. 2,6,5,14,11,26,17,____ Answer:38
48. 2,1,2,4,8,2,16,0.5,8,3/4,___ Answer:6
49. 1,-1,2,-6,2,-2,4,-12,3,____ Answer:-3
50. 1/2,5/4,2,11/4,7/2,____ Answer:17/4
51. 3,4,12,6,1,8,8,4,5,6,30,____ Answer:15
52. 1/2,1/4,3/4,3/8,7/8,7/16,____ Answer:15/16
53. 2,7,-35,7,12,-60,5,10,_____ Answer:-50
54. 340,680,1428,3141.6,_____ Answer:7225.68
55. 7/6,3/2,1,5/6,13/6,5/2,____ Answer:2
56. 92,48,16,10,6.5,____ Answer:5.25
57. 3,6,0,18,4,5,1,20,5,1,6,____ Answer:24
58. 7.2,2.2,3.2,16,11,12,60,55,56,___ Answer:280
59. 135,486,422,224,140,541,134,431,145,596,421,124,150,_____ Answer:651
60. 52,62,42,78,89,68,49,61,39,63,76,___ Answer:53
61. 2,1/3,2/3,6,7,1/2,7/2,14,20,1/5,4,___ Answer:100
62. 3,8,2,7,7,12,12,____ Answer: 17
63. 1,11,21,1211,111221,_____ Answer:312211
64. 2^4,6,5^9,14,11^15,26,17^25,____ Answer:42
65. 9,7,7,9,13,___ Answer:19
66. 4.2,26.0,8.9,8.4,52.0,17.8,16.8,104,____ Answer:35.6
67. 12,48,96,384,768,____ Answer:3072
68. 7,4,6,3,4.5,1.5,2.25,-0.75,____ Answer:-1.125
69. 7,28,63,124,____ Answer:215
70. -16,-8,4,24,12,-6,-40,20,____ Answer:-10
71. 1,2,9,24,120,36,_____ Answer:5040
72. 3,1,13,11,31,29,____ Answer:57
73. 6,120,504,1320,_____ Answer:2730
74. 1/2,3/16,5/8,____ Answer:11/16
73. 0.00005,0.001,0.02,0.4,_____ Answer:8
74. 1,2,3,5,7,10,13,17,_____ Answer:21
75. 18,20,10,12,4,6,____ Answer:0
76. 2,4,8,2,16,0.5,8,3/4,____ Answer:6
77. 32,0.2,160,15,0.5,30,28,0.7,____ Answer:40
78. 1,3,3,2,8,10,3,4,12,4,8,____ Answer:12
79. 5/6,1/3,1/2,1/2,2/8,1/4,5/6,1/6,2/3,1/2,1/3,____ Answer:1/6
80. 3,7,10,8,4,12,0,5,5,3,2,____ Answer:5
81. 56,88,33,21,57,88,35,19,60,85,30,____ Answer:24
82. 5,1,2,8,8,1,0,9,9,2,3,____ Answer:14
83. 4,2,4,8,6,8,16,____ Answer:14
84. 9,4,16,6,36,21,441,____ Answer:421
85. 4,20,84,340,____ Answer:1364
86. 1370,1320,1070,-180,_____ Answer:-6430
87. 8,2,14,6,11,_____,14,6,18,12 Answer:9
88. 3,10,13,20,23,30,____ Answer:33
89. 18,24,5,21,27,8,17,23,4,24,30,___ Answer:11
90. 3,8,12,48,29,____ Answer:144
91. 21,22,21,22,23,22,23,24,23,24,____ Answer:25
92. 1,1/2,3/2,2,5,1/3,16/3,15,12,1/4,49/4,___ Answer:48
93. 9,3,6,21,9,12,33,15,_____ Answer:18
94. 0,1,1,2,0.5,2,2,4,2,2,4,3,7,2,____ Answer:3.5
95. 3,8,13,24,41,____ Answer:70
96. 3,4,12,6,1,8,8,4,5,6,30,_____ Answer:15
97. 2,3,10,15,26,____ Answer:35
98. 507,169,248,62,36,12,168,42,168,____ Answer:56
99. 100,98,95,90,83,____ Answer:72
100. 5,6,7,8,10,11,14,_____ Answer:15
101. 4,3,5,9,12,17,____ Answer:26
102. 3,6,11,18,___ Answer:27
103. 54,49,____,39,34 Answer:44
Read Solution (Total 66)
-
- 1 ) 39, 41 , 25, 26, 27, 38, 40, 24, 25, 26, ...................
(39, 41)...... 25, 26,27.......(38,40)...... 24,25,26 ......(37,39)
ans - 37 - 7 years agoHelpfull: Yes(58) No(9)
- 1,46,163,388,757,_____ ? what is the process for this?
- 7 years agoHelpfull: Yes(19) No(2)
- 4) 1^2 + 2 = 3
2^2 * 2 = 8
3^2 + 3 = 12
4^2 * 3 = 48
5^2 + 4 = 29
6^2 * 4 = 144.
So, the next number is 144.
The series is 3, 8, 12, 48, 29, 144. - 7 years agoHelpfull: Yes(10) No(2)
- 36)
18-5= 13*1=13
13-5= 8*2=16
16-5= 11*3=33
33-5= 28*4=112
112-5=107*5=535
ans: 535 - 7 years agoHelpfull: Yes(10) No(0)
- 20)
2, 3*2, 5, (7 left),11, 13*2, 17, ...next to next prime(leave 19) 23 ans.
Ans : 23 - 7 years agoHelpfull: Yes(9) No(1)
- 3] 4,11,66,74,370,379
4+7=11
11*6〓66
66+8〓74
74*5〓370
370+9〓379
379*4〓1516 - 7 years agoHelpfull: Yes(7) No(2)
- 37)
4,8,24,60 and 3,4,13 are two series
find diff first
4,16,36 (which are squares of 2,4,6)
1,9 ( squares of 1,3) so nxt in this series will be square of 5
i.e 25 ..... 13+25=38 - 7 years agoHelpfull: Yes(7) No(0)
- 2. 4,2,4,8,6,8,16,____
Divide the series into a group of 3 each
4 2 4 -> 4-2 2 2+2
8 6 8 ->8-2 6 6+2
16 14 16 ->16-2 14 14+2
Answer:14
3. 4,11,66,74,370,379,____
4 11 66 74 370 390 1516
+7 *6 +8 *5 +9 *5
Answer:1516
4. 3,8,12,48,29,____
1^2 + 2 = 3
2^2 * 2 = 8
3^2 + 3 = 12
4^2 * 3 = 48
5^2 + 4 = 29
6^2 * 4 = 144.
Answer;144
5. 4608,2304,576,288,72,____
46082/2=2304
2304-576=1738
576/2=288
288-72=216
72/2=36
Answer:36
6. 11,13,17,19,23,29,31,37,41,____
Consider 4 terms to solve
11+2=13+4=17+2=19
19+4=23+6=29+2=31
31+6=37+4=41+2=43
Answer:43
7. 0.8,1.8,3.6,3.6,4.6,9.2,9.2,10.2,____
Divide into group of 3,we get this sequence
mid-1,mid,mid+mid
0.8,1.8,3.6
3.6,4.6,9.2
9.2,10.2,20.4
Answer:20.4
8. 0,1,2,0.5,2,2,2,2,4,3,2,____
Consider 4 terms,
0+1/2=0.5
2+2/2=2
4+3/2=3.5
Answer:3.5
9. 1,3,3,2,8,10,3,4,12,4,8,____
Divide into group of 3(we get *3,+8 logic for series)
1*3=3 2+8=10 4*3=12 4+8=12
Answer:12
10. 7,-14,-4,15,-30,-20,-21,-42,___
Divide into group of 3
mid*-2,mid,mid+10 logic for first 2 sets
i.e -14*-2 -14 -14+10
-30*-2 -30 -30+10
3rd set has a negative term,
-42*-21 -42 -42-10(same as above but with a negative sign)
Answer : 52
Hope this helps you all ! All the best folks ! - 7 years agoHelpfull: Yes(6) No(2)
- 2) 4 2 4 4-2 =2 middl numbr
8 6 8 8-2=6 mdl numbr
16 14 16 16 -2 =14 mdl numbr - 7 years agoHelpfull: Yes(5) No(0)
- 103)54,49,______,39,34
54-49=5
39-34=5 so 49-44=5 so the series is 54,49,44,39,34 - 7 years agoHelpfull: Yes(5) No(0)
- 6) 0.8, 1.8, 3.6, 3.6, 4.6, 9.2, 9.2, 10.2
Divide the given series into 3 parts
(0.8, 1.8, 3.6, ) (3.6, 4.6, 9.2 ) (9.2, 10.2 ? )
0.8+1〓1.8. 3.6+1〓4.6. 9.2+1〓10.2
1.8*2〓3.6. 4.6*2〓9.2. 10.2*2〓20.4
Ans is 〓20.4 - 7 years agoHelpfull: Yes(5) No(0)
- 45) (0,1,1,1),(1,2,1,3),(3,2,1,?)
0+1/1=1
1+2/1=3
3+2/1=5(Ans) - 7 years agoHelpfull: Yes(5) No(2)
- 36.) 1*(18-5)=1*13=13
2*(13-5)=16
3*(16-5)=33
4*(33-5)=112
5*(112-5)=107*5 = 535 - 7 years agoHelpfull: Yes(4) No(0)
- 38)
Reverse of number divided by 2
42=> 24/2 =12
40=> 04/2 =2
Similar.....
62=> 26/2 =13 Ans - 7 years agoHelpfull: Yes(4) No(0)
- 77) 32,0.2,160,15,0.5,30,28,0.7,____ Answer:40
32/0.2 = 160
15/0.5 = 30
28/0.7 = 40 - 7 years agoHelpfull: Yes(3) No(0)
- 22) 6, 8,10, 8,15,17,12,16
Divide the series 3 parts
(6, 8, 10). (8 ,15,17 ) (12,16, ?)
(6+8)-4〓10. ( 8+15)-6〓17. (12+16)-8〓20
Ans is 20 - 7 years agoHelpfull: Yes(3) No(0)
- 16)
Logic: 2, (2+7)*1 = 9, (9+6)*2 = 30, (30+5)*3 = 105 ,(105+4)*4 = 436 "missing one" (436+3)*5=2195 - 7 years agoHelpfull: Yes(3) No(0)
- 1. 4,4,5,6,8,11,16,24,_____ Answer:37
Diff b/w numbers is 0,1,1,2,3,5,8
0+1=1,1+1=2, 1+2=3, 2+3=5,3+5=8, 5+8=13
Ans is 24+13=37 - 7 years agoHelpfull: Yes(2) No(0)
- 12.
1/2+3/4 = 5/4
5/4+3/4 =2
2+3/4=11/4
11/4+3/4=7/2
7/2+3/4=17/4 - 7 years agoHelpfull: Yes(2) No(0)
- 7) 0.8, 1.8, 3.6, 3.6, 4.6, 9.2, 9.2, 10.2,...........
1.8+1.8=3.6 , 4.6+4.6=9.2, 10.2+10.2=20.4 - 7 years agoHelpfull: Yes(2) No(1)
- 53) 2,7,-35,7,12,-60,5,10...
2-7 = -5 *7 = -35
7-12 = -5 * 12 = -60
5-10 = -5* 10 = -50
ans = -50 - 7 years agoHelpfull: Yes(2) No(0)
- 23) 11,8,17,14,23,24,31,32
Ans. 11
13-5〓8
17
19-5〓14
23
29-5〓24
31
37-5〓34
41
Prime number series after 37 the next prime number is 41 - 7 years agoHelpfull: Yes(2) No(0)
- 8) 0+1/2=0.5
(2+2)/2=2
(4+3)/2=3.5 - 7 years agoHelpfull: Yes(2) No(0)
- 100: there are two series one is - 5(1st)+2=7(3rd)+3=10(5th)+4(7th)
another is - 6(2nd)+2=8(4th)+3=11(6th)+4=15(ans) - 7 years agoHelpfull: Yes(1) No(0)
- 73) 0.00005,0.001,0.02,0.4,_____ Answer:8
0.00005*20 = 0.001
0.001 * 20 = 0.02
0.02 * 20 = 0.4
0.4 * 20 = 8
ans-->8 - 7 years agoHelpfull: Yes(1) No(0)
- 76)2,4,8,2,16,0.5,8,3/4,____ Answer:6
2*4 =8
8*2 = 16
16*0.5 = 8
8*3/4 = 6 - 7 years agoHelpfull: Yes(1) No(0)
- 45.) The question should be 0,1,1,1,1,2,1,3,3,2,1,?
You can google the question. Then you can find the answer. - 7 years agoHelpfull: Yes(1) No(1)
- 14. 9,3 =3*3, 24,4=4*6
9,3 =3*3, 36,6=6*6
9,3 =3*3, 30,"5"=5*6 so ans is 5 - 7 years agoHelpfull: Yes(1) No(0)
- 8) 0, 1, 2, 0.5, 2, 2, 2, 2, 4, 3, 2, _
0, 1, 2, 0.5 -> (0+1)/ 2 = 0.5
2, 2, 2, ,2 -> (2+2)/2 = 2
4, 3, 2, _ -> (4+3)/ 2 = 3.5
ans is 3.5 - 7 years agoHelpfull: Yes(1) No(0)
- 19). 33 8 4 46 21 ?
46-33=13,21-8=13, ?-4=13
so ?=17 - 7 years agoHelpfull: Yes(1) No(0)
- 21) 1,46,163,388,757,?
diff. 46-1,163-46,388-163,757-388
45 ,117, 225 ,369 ,
again diff 117-45=72, 225-117=108,369-225=144
so we have 72, 108, 144
which are 6*12 ,9*12,12*12
so next will be 15*12=180
second series will be 45, 117, 225,369,549(180+369)
final series 1, 46 ,163,388,757,(757+549=1306) - 7 years agoHelpfull: Yes(1) No(0)
- 24) 1/4,1/4,1/2,3/2,6,?
1/4*1=1/4,1/4*2=1/2,1/2*3=3/2,3/2*4=6
so ?=6*5=30 - 7 years agoHelpfull: Yes(1) No(0)
- 27) 24,42,1/2,2,65,56,1 1/5,5/6,73,37,___
24 reverse 42
2/4 =1/2 (i.e. fraction of tense digits of previous 2 numbers) then reverse 1/2=2
65 reverse 56
6/5(i.e. fraction of tense digits of previous 2 numbers) then reverse 5/6
73 reverse 37
7/3 - 6 years agoHelpfull: Yes(1) No(2)
- 36----> 18,13,16,33,112,____ Answer:535 any one explain???
- 7 years agoHelpfull: Yes(0) No(0)
- Please send answers to the above questions
- 7 years agoHelpfull: Yes(0) No(0)
- 99.) ans:74
i think the ans of 99th que, should be 74
becoz der izz difference of 2 , 3,5,7..............then last one should be 9 i.e 74 - 7 years agoHelpfull: Yes(0) No(6)
- Hi , I am attending IBM drive for the first time so please guide what all to prepare and in this series questions is it written test or MCQ. PLEASE REPLY ASAP!!
- 7 years agoHelpfull: Yes(0) No(0)
- Q)12
12 , 54, 2 , 114 , 72
1+14=24= 12
2+34= 54
3+54=84= 2
4+74= 114
5+94=144= 72
6+114= 174
ans:174 - 7 years agoHelpfull: Yes(0) No(0)
- Can someone provide me round two bussiness communication questions java questions
hemalathasham22@gmail.com - 7 years agoHelpfull: Yes(0) No(0)
- Can anyone please send me explanation of these series problems at neerujatcs@gmail.com. need it urgently.
Thanks in advance. - 7 years agoHelpfull: Yes(0) No(0)
- 96) 3,4,12,6,1,8,8,4,5,6,30,?
3*4 = 12, 12/2=6
1*8 = 8, 8/4 = 4
5*6 = 30, 30/2 = 15
ans = 15 - 7 years agoHelpfull: Yes(0) No(0)
- 93)
9 = 3+6(9,3,6)
21 = 9+12(21, 9,12)
33 = 15+18(33,15,?)
ans = 18 - 7 years agoHelpfull: Yes(0) No(1)
- 103) 54,49,____,39,34 Answer:44
34+5=39
39+5=44(ans)
44+5=49
49+5=54
so (44) is the ans - 7 years agoHelpfull: Yes(0) No(0)
- 98)507,169,248,62,36,12,168,42,168,____
here 169*3=507,62*4=248,12*3=36,42*4=168,56*3=168
so the series is 507,169,248,62,36,12,168,42,168,56 - 7 years agoHelpfull: Yes(0) No(0)
- 95)3,8,13,24,41____
3+8=11,11+2=13
8+13=21,21+3=24
13+24=37,37+4=41
24+41=65,65+5=70 - 7 years agoHelpfull: Yes(0) No(0)
- 1) 39 - 41 = 2;
25 - 41 = -16;
26 - 25 = 1 ; 27 - 26 =1;
38 - 27 = 11;
again the pattern is repeat
40 - 38 =2;
24 - 40 = -16;
25 -24 = 1; 26 - 25 =1;
x - 26 =11
x= 26 + 11 = 37
So 37 is our next number - 7 years agoHelpfull: Yes(0) No(0)
- Anybody having Solution of 11th question??
- 7 years agoHelpfull: Yes(0) No(0)
- 9)1*3=3
2+8=10
3*4=12
4+8=12
alternatively multiply and add and display results - 7 years agoHelpfull: Yes(0) No(0)
- 6>11,13,17,19,23,29,31,37,41,?
11+17/2=14-1=13
17+2=19
19+29/2=24-1=23
29+2=31
31+41/2=36+1=37
41+2=43
ANS is 43. - 7 years agoHelpfull: Yes(0) No(2)
- 9 ) 1,3,1*3,2,8,2+8,3,4,3*4,4,8,4+8
- 7 years agoHelpfull: Yes(0) No(0)
- 17.2,5,9,1,5,10,3,8,?
Divide the series in to 3 parts
2,5,9 =(9+2)-1÷2=5 middle number
1,5,10=(10+1)-1÷2=5 middle number
3,8,?=(?+3)-1÷2=8
?-2=16
?=14 - 7 years agoHelpfull: Yes(0) No(0)
- 4.
1^2+2=3
2^2*2=8
3^2+3=12
4^2*3=48
5^2+4=29
6^2*4=144 - 7 years agoHelpfull: Yes(0) No(0)
- what is the correct ans of 1st one with explanation?
- 7 years agoHelpfull: Yes(0) No(0)
- 4608,2304,576,288,72
2304*2=4608
288*2=576
36*2=72
So ans is 36 - 7 years agoHelpfull: Yes(0) No(0)
- 25) take a set of three no (4.2,7.2,11.4) ( 6.1,9.1,15.2 ) (3.8,6.8, ?)
1st set 7.2-4.2=30,11.4-7.2=4.2
2nd set 9.1-6.1=30,15.2-9.1=6.1 means diff. b/w 2nd &3rd no =1st no.of set
3rd set 6.8-3.8=30,?-6.8=3.8
so ?=6.8+3.8=10.6 - 7 years agoHelpfull: Yes(0) No(0)
- 40) 8,8 ,10,18,44,124,?
(8-4)*3-4=8
(8-4)*3-2=10
(10-4)*3-0=18
(18-4)*3+2=44
(44-4)*3+4=124
(124-4)*3+6=366 - 7 years agoHelpfull: Yes(0) No(0)
- 42) 2 ,9,23,79,415,?
9-2=7, 23-9=14, 79-23=56 , 415-79=336
7*2=14, 14*(2+2)=56, 56*6=336, 336*8=2688
so ?=415+2688=3103 - 7 years agoHelpfull: Yes(0) No(0)
- 61) 2, 1/3, 2/3 , 2*3=6
7,1/2, 7/2 , 7*2=14
20, 1/5 , 4 or (20/5) ,20*5=100 - 7 years agoHelpfull: Yes(0) No(0)
- 12)1/2,5/4,2,11/4,7/2
adding 3/4 to each term - 6 years agoHelpfull: Yes(0) No(0)
- 103)54,49,__,39,34
subtract -5 from each number
we get 54-5=59
49-5=44
39-5=34
102)3,6,11,18
2^2-1=3
3^2-3=6
4^2-5=11
5^2-7=18
then similarly
6^2-9=27
this is anirudh reddy kamidi - 6 years agoHelpfull: Yes(0) No(0)
- 2.ans will be 12 not 14
- 6 years agoHelpfull: Yes(0) No(1)
- 103) 54,49,----,39,34
54-5=49,39-5=34
=49-5=44 - 6 years agoHelpfull: Yes(0) No(0)
- 102) I think given number is wrong. Answer will be 29. Because 9 is not a prime number.
- 6 years agoHelpfull: Yes(0) No(0)
- 2) (4,2,4)----(8,6,8)----(16,14,16)
14 is ans - 5 years agoHelpfull: Yes(0) No(0)
- 94) 0 1 1 2 0.5 2 2 4 2 2 4 3 7 ?
Ans: 0+1=1, 1/2=0.5
2+2=4, 4/2=2
4+4=7, 7/2=3.5
So, ans is 3.5✓ - 5 years agoHelpfull: Yes(0) No(0)
- 8) The answer is "5.5" , not 35:
0+1/2=0.5
2+2/2=2
4+3/2=5.5 - 5 years agoHelpfull: Yes(0) No(0)
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