IBM
Company
Logical Reasoning
Number Series
1) 8,16,3,27,4,8,7,19,2,0,7, ?
2) 0.5,2,3,4.5,6.75, ?
3) 1/3, 1/2, 1/4, 2 1/3, 3 1/2, 4 1/4, 4 1/3, 6 1/2,?
4) 4.2,26.0,8.9,8.4,52.0,17.8,16.8,104,?
5) 33,8,41,46,21,67,72,47,119,124, ?
6) 6,18,21,8,11,33,2,6,9,5,8,24,7,21
7) 1370,1320,1070,-180, ?
8) 24, 42, 1/2,2,65,56,6/5,5/6,73,37, ?
9)4,2,5,9,11,13,7,16,17,9, ?
10)56,89,33,21,57,88,35,19,60,85,39,15,?
Read Solution (Total 23)
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- 1)8,16,3,27,4,8,7,19,2,0,7
(8,16,3,27)(4,8,7,19)(2,0,7,?)
8+16+3=27
4+8+7=19
2+0+7=9(ans)
2)0.5,2,3,4.5,6.75,?
o.5+1.5=2
2*1.5=3
3+1.5=4.5
4.5*1.5=6.75
6.75+1.5=8.25(ans)
3)1/3, 1/2, 1/4, 2 1/3, 3 1/2, 4 1/4, 4 1/3, 6 1/2,?
(1/3, 1/2, 1/4)( 2 1/3, 3 1/2, 4 1/4) (4 1/3, 6 1/2,?)
1/3, 1/2, 1/4
2 1/3, 3 1/2, 4 1/4
4 1/3, 6 1/2,8 1/4(ans)
4) 4.2,26.0,8.9,8.4,52.0,17.8,16.8,104,?
( 4.2,26.0,8.9)(8.4,52.0,17.8)(16.8,104,?)
4.2*2=8.4 26.0*2=52.0 8.9*2=17.8
8.4*2=16.8 52.0*2=104.0 17.8*2=35.6(ans)
5)33,8,41,46,21,67,72,47,119,124,?
(33,8,41)(46,21,67)(72,47,119)(124,?)
33-25=8 33+8=41 41+5=46
46-25=21 46+21=67 67+5=72
72-25=47 72+47=119 119+5=124
124-25=99 124+99=223
(124,99,223)(ans)
- 10 years agoHelpfull: Yes(43) No(2)
- 6. 6,18,21,8,11,33,2,6,9,5,8,24,7,21,
(6*3=18+3=21)
(8+3=11*3=33)
(2*3=6+3=9)
(7*3=21+3=24) Ans- 24 - 10 years agoHelpfull: Yes(36) No(8)
- Q.7 hey piya your logic is right but answer should be -6430 because-
1370-1320=50
1320-1070=250
1070-(-180)= 1250
now we know that difference is 6250 so answer would be
-180-x= 6250
x=(-180-6250)= -6430(ans.)
- 10 years agoHelpfull: Yes(23) No(3)
- 10)(56,89,33,21),(57,88,35,19),(60,85,39,15)
as 56+1=57,57+3=60 (+1,+3,+5 as follows )
as 89-1=88,88-3=85 (-1,-3,-5 as follows)
as 33+2=35,35+4=39 (+2,+4,+6 as follows )
as 21-2=19,19-4=15 (-2,-4,-6 as follows )
so as from 1st ....
as 60+5=65
next term will be 65
hence ans=65 - 10 years agoHelpfull: Yes(13) No(0)
- 7. difference is increasing by 50 ,50x5=250,250x5=1250,1250x5=6250
- 10 years agoHelpfull: Yes(11) No(2)
- 8) 7/3 , 3/7 as
2/4=1/2 4/2=2
6/5 , 5/6
- 10 years agoHelpfull: Yes(10) No(0)
- 9)4,2,5,9,5,11,13,7,16,17,9?
4 2 5
9 5 11
13 7 16
17 9 x
in each order substitute last two numbers
5-2=3
11-5=6
16-7=9
x-9=12 => x=12+9=21(ans) - 9 years agoHelpfull: Yes(7) No(2)
- 1. add first 3 number and u will get the 4th one
Ans===2+0+7=9
2.0.5+1.5=2
2*1.5=3
3+1.5=4.5
4.5*1.5=6.75
6.75+1.5=8.25
Ans=8.25
3.
Ans==81/4
4.35.6
5.149
7.1370-(50*5^0)=1320
1320-(50*5^1)=1070
8.7/3
- 10 years agoHelpfull: Yes(4) No(0)
- 1)Ans is 9
8+16+3=27
4+8+7=19
2+0+7=9
2)Ans is 8.25
0.5+1.5=2+1=3+1.5=4.5+1.25=6.75+1.5=8.25
3)Ans is 81/4
1/3 1/2 1/4
21/3 31/2 41/4
41/3 61/2 81/4
4)Ans is 35.6
4.2+4.2=8.4+8.4=16.8
26+26=52+52=104
8.9+8.9=17.8+17.8=35.6
5)Ans is 99
33+(13*1)=46+(13*2)=72+(13*4)=124
8+(13*1)=21+(13*2)=47+(13*4)=99 - 10 years agoHelpfull: Yes(3) No(1)
- 10) 56 89 33 21
+1 -1 +2 -2
57 88 35 19
+3 -3 +4 -4
60 85 39 15
+5 -5 +6 -6
65 80 45 9 - 10 years agoHelpfull: Yes(2) No(0)
- 9)4,2,5,9,5,11,13,7,16,17,9
ans 12
consider 4,2,5 series 5-4=1;
9,5,11 11-9=2;
13,7,16 16-13=3;
17,9,x 17-x=4 therefore x=13. - 10 years agoHelpfull: Yes(2) No(17)
- 8)24, 42, 1/2,2,65,56,6/5,5/6,73,37, ?
24, 42 ,2/4,4/2,65,56,6/5,5/6,73,37,7/3
- 9 years agoHelpfull: Yes(2) No(0)
- 8)24 is written as 2/4-->1/2
42 is written as 4/2-->2
65 is written as 6/5 results 6/5
56 is written as 5/6-->5/6
in the same way 73 is written as 7/3
37 is written as 3/7
- 9 years agoHelpfull: Yes(2) No(0)
- 8)7/3
24,42,2/4=1/2
65,56,6/5 - 10 years agoHelpfull: Yes(1) No(0)
- 7)1370-50=1320
1320-(50*5)=1320-250=1070
1070-(250*5)=1070-1250= -180
(-180)-(1250*5)=(-180)-(6250)=-6430
the next term is -6430
- 9 years agoHelpfull: Yes(1) No(0)
- (8):24,42,2/4,4/2,65,56,6/5,5/6,73,37,7/3,3/7
- 9 years agoHelpfull: Yes(1) No(0)
- 3> see denominator and numerator (1/3, 21/3, 41/3)
(1/2,31/2,61/2)
(1/4,41/4,x)
denominator of x=4
numerator of x=81 - 10 years agoHelpfull: Yes(0) No(0)
- 33+8=41
46+21=67
72+47=119
NOW, 67-41=26 (26*1)
119-67=52 (26*2)
SO, 26*3=78
119+78=197
THEREFORE, 197-124=73 ANS - 10 years agoHelpfull: Yes(0) No(1)
- Taking alternate terms from the beginning of the series, then :
56,33,57,35,60,39,?
now,
(33-56=-23),(57-33=+24),(35-57=-22),(60-35=+25),(39-60=-21)
so, +25 must be added to 39 n thus ans is "65". - 10 years agoHelpfull: Yes(0) No(0)
- MOUSUMI SAHA
can u please explain me the ans of 3 qs given in the series
i could'nt solve - 10 years agoHelpfull: Yes(0) No(1)
- can anyoneplease explain ques. no 9's logic
- 10 years agoHelpfull: Yes(0) No(0)
- plz....xplain 9th solution...........ayshu.530@gmail.com
- 10 years agoHelpfull: Yes(0) No(0)
- 1)Ans is 9
8+16+3=27
4+8+7=19
2+0+7=9
2)Ans is 8.25
0.5+1.5=2+1=3+1.5=4.5+1.25=6.75+1.5=8.25
3)Ans is 81/4
1/3 1/2 1/4
21/3 31/2 41/4
41/3 61/2 81/4
4)Ans is 35.6
4.2+4.2=8.4+8.4=16.8
26+26=52+52=104
8.9+8.9=17.8+17.8=35.6
- 9 years agoHelpfull: Yes(0) No(0)
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