IBM
Company
Logical Reasoning
Number Series
1)5,5,7,7,9,11,11,13,13,17,15,19,17,?
2)2,1/3,2/3,6,7,1/2,7/2,14,20,1/5,4,?
3)2/3, 5/3,19/6,31/6,23/3,32/3,65/6,?
4)4,11,66,74,370,379,?
5)4,2,36,4,5,1,36,16,6,3,81,?
6)5,10,25,15,30,75,150,80,155,400,?
7)3,8,12,48,29,?
8)5,16,22,68,28,87,34,106,11,?
9)2,1,2,3,8,0,1,9,1,2,?
10)2,6,5,14,11,26,17,?
11)3/2,9/4,9/4,7/2,49/4,49/4,4/3,16/9,16/9,8/3,?
12)8,0.5,16,4,15,0.3,50,4.5,6,0.2,30,?
13)7,0,1,8,5,12,9,26,3,23,2,?
14)33,8,41,46,21,67,72,47,119,124,?
15)30.5,31,30,0,67.2,67,70,100,183.9,?
16)4,6,2,12,18,14,?
17)3.2,4.2,4.7,2.7,6.2,1.2,7.7,-0.3,9.2,-1.8,?
18)10,12,-36,-7,-5,15,19,21,?
Ans::
1)ans=23
there are 4 different series 1st:5,9,13,17… and 2nd:5,11,17,?
3rd:7,11,15… and 4th:7,13,19…
Obs: gap of 4 in 1st and 3rd ,where as gap of 6 in 2nd and 4th
2) 2,1/3,2/3,6,7,1/2,7/2,14,20,1/5,4,?
ans=4
(2,1/3,2/3,6)……2*1/3=2/3 and 2*3=6
(7,1/2,7/2,14)…..7*1/2=7/2 and 7*2=14
(20,1/5,4,?)……20*1/5=4/1 and 4*1=4
3)
4) 4,11,66,74,370,379,?......ans=1516
4+7=11 and 11*6=66
66+8=74 and 74*5=370
370+9=379 and 379*4=1516
5) 4,2,36,4,5,1,36,16,6,3,81,?....ans=9
(4,2,36,4),……(4+2)^2=36 and (4-2)^2=4
(5,1,36,16),….(5+1)^2=36 and (5-1)^2=16
6,3,81,?..........therefore (6-3)^2=9
Read Solution (Total 45)
-
- 6)
1) 5,10,25,15,30,75,150,80,155,400,( 775)
Basically this series is divided Into two sub series figured as :
a)5 , 25, 30, 150, 155 and
b) 10 15 75 80 400 So we can see that In a) series its like Multiply by 5 and then add 5
Similarly in b) series its like add 5 and then Multiply by 5 and so on
5 5*5 5*5 +5 30*5 150 + 5 similarly for b) SO the Answer will be 155 * 5 = 775 - 9 years agoHelpfull: Yes(19) No(0)
- 9)
2^1=2,2^3=8,8^0=1,1^9=1,1^2=1
so, answer will be 1 - 9 years agoHelpfull: Yes(13) No(0)
- 3)(2/3,5/3),(19/6,31/6),(23/3,32/3),(65/6,?)
difference between pairs=5/3-2/3=3/3=1
31/6-19/6=12/6=2
32/3-23/3=9/3=3
x/6-65/6=24/6=4
so x=65+24=89 - 9 years agoHelpfull: Yes(11) No(1)
- 8)ans=38
5*3+1=16
22*3+2=68
28*3+3=87
34*3+4=106
11*3+5=38.
12)ans=1.2
3 diff series- 8,0.5,16,4
8*0.5=4(product of first two digit gives last digit)
0.5*16=8.0(product of middle gives first)
in the same way--15,0.3,50,4.5 and 6,0.2,30,1.2
- 9 years agoHelpfull: Yes(7) No(0)
- 14) answer =99
[33 8 41] [46 21 67] [72 47 119] [124 x ?]
now 1st number in all group is:
46-33=13(difference)
72-46=26
124-72=52
here difference is 13 26 52
now same with 2nd numbers
21-8=13
47-21=26
x-47=52
x=52+47
x=99
16)4 6 2 12 18 14
[4 6 2] [12 18 14] [x y z]
now 1st numbers in groups
4*3=12
6*3=18
2*7=14
here multiplication numbers are 3 3 7
now same with 2nd groups
12*3=36
18*3=54
14*7=98
here x=36 y=54 z=98
18) 10 12 -36 -7 -5 15 19 21 ?
now here remove one number and take next two number
now series would be
_ 12 -36 _ -5 15 _ 21 ?
12*(-3)=36
-5*(-3)=15
21*(-3)=-63
answer is -63 - 9 years agoHelpfull: Yes(6) No(2)
- 13) 7+0+1= 8, 5+12+9= 26 , 3+23+2= 28
- 9 years agoHelpfull: Yes(5) No(0)
- 2) 2,1/3,2/3,6,7,1/2,7/2,14,20,1/5,4,?
ans=4
(2,1/3,2/3,6)……2*1/3=2/3 and 2%1/3=6
(7,1/2,7/2,14)…..7*1/2=7/2 and 7%1/2=14
(20,1/5,4,?)……20*1/5=4/1 and 20%1/5=100
Read more at http://www.m4maths.com/placement-puzzles.php?SOURCE=IBM#RQCtoYD0tlwlZTZH.99 - 9 years agoHelpfull: Yes(5) No(2)
- Q 10 ) 2,6,5,14,11,26,17,?
Write down the Prime Numbers
2,3,5,7,11,17,19.....
Now the series be2,(3*2),5,(7*2),11,(13*2),17,(19*2).. = 2,6,5,14,11,26,38
ans wil be 19*2 = 38
- 9 years agoHelpfull: Yes(5) No(0)
- correct answer of qustion number7
7)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 - 9 years agoHelpfull: Yes(4) No(1)
- 5) tere r 2 diff series 1:5,25,30,150,155=5*5=25+5=30*5=150+5=155*5=575
2;10,15,75,80,400=> 10+5=15*3=75+5=80*5=400 - 9 years agoHelpfull: Yes(3) No(3)
- 7) 5*3+1=16
22*3+2=68
28*3+3=87
34*3+4=106
11*3+5=38 - 9 years agoHelpfull: Yes(3) No(1)
- 2)2,1/3,2/3,6------2*1/3=2/3,2/(1/3)=6
like wise
20,1/5,4,?-----20*1/5=4,20/(1/5)=100 - 9 years agoHelpfull: Yes(2) No(0)
- 11)64/9
3^2/2^2=9/4
7^2/2^2=49/4
(4/3)^2=16/9
like wise
(8/3)^2=64/9 - 9 years agoHelpfull: Yes(2) No(0)
- 14)step1: 33+8=41, 46+21=67 , 72+47=119 ,124+?=?
step2: 41+5=46 ,67+5=72 , 119+5=124
step3: see the numbers 8,21,47.....
8*2+5=21,21*2+5=47,so the next num is 47*2+5=99(ANS) - 9 years agoHelpfull: Yes(2) No(0)
- 2] it should be 100
- 9 years agoHelpfull: Yes(2) No(0)
- 3)
2/3, 5/3,numretor has difference of 3
19/6,31/6,numretor has diff of 12,,but here denominator is 6,so make it 3 by taking 2 common..so difference will become 12/2=6,
,23/3,32/3,again num has diff of 9,
65/6,?--so now num should have diff of 12,but here den is 6,so 12*2=24,,so next term 89/6
ans 89/6 - 9 years agoHelpfull: Yes(1) No(0)
- 3)89/6
5-2=3/3=1,31-19=12/6=2,32-23=9/3=3,89-65=24/6=4
so sries as 1,2,3,4 - 9 years agoHelpfull: Yes(1) No(0)
- 15.) ans- 184 by Rounding Concept
- 9 years agoHelpfull: Yes(1) No(0)
- 14) there are 3 Pattern
1st 33+8=41
2nd. 46+21=67
3rd. 72+47=119
since 33-8=25
46-21=25
- 9 years agoHelpfull: Yes(1) No(3)
- (11)3/2*3/2=9/4
7/2*7/2=49/4
4/3*4/3=16/9
8/3*8/3=64/9 - 9 years agoHelpfull: Yes(1) No(0)
- Q NO: 10
2,6,5,14,11,26,17,?
series 1: 2,5,11,17- (2^2+1),(3^2+2),(4^2+1),....
series 2: 6,14,26,? -(6*2+2),(14*2-2),(26*2+2).....
ANS: 54 (DOUBLE THE DIGIT AND ADD+2,-2 FOR CONSECUTIVE DIGITS)
- 9 years agoHelpfull: Yes(1) No(1)
- 1) Ans=23
Explanation: firstly 5,7,9,11,13,15,17 each added with 2+
Secondly 5,7,11,13,17,19 starting with 2+and then 4+ repeating this procedure - 9 years agoHelpfull: Yes(1) No(0)
- Question 10)
first series 2,5,11,17,.....
2*3=6-1=5
2*6=12-1=11
2*9=18-1=17
Second Series 6,14,26,?,.....
6*2=12+2=14
6*4=24+2=26
6*6=36+2=38
so Answer is 38 - 9 years agoHelpfull: Yes(1) No(0)
- 13)(7+0+1)=8
(5+12+9)=26
(3+23+2)=28 so ans:28 - 9 years agoHelpfull: Yes(1) No(0)
- 17) ans is 10.7 (3.2,4.2),(4.7,2.7),(6.2,1.2),(7.7,-0.3),(9.2,-1.8),?
if we add the numbers in each pair we get 7.4
just observe the first elements in all pairs i.e
3.2+1.5=4.7
4.7+1.5=6.2
6.2+1.5=7.7
7.7+1.5=9.2
like that 9.2+1.5=10.7
:)
- 7 years agoHelpfull: Yes(1) No(1)
- 10)2,6,5,14,11,26,17,?
The first series is 2,5,11,17
2+3=5
5+6=11
11+6=17
the pattern followed is +3 +6 +11
second series 6 14 26
6+8=14
14+12=26
26+12=38
the pattern is +8 +12 +12 - 9 years agoHelpfull: Yes(0) No(8)
- 6)=775,405
8)=104
10)=38
11)=64/9
- 9 years agoHelpfull: Yes(0) No(1)
- pls can any 1 explain it properly and tel the solution?
- 9 years agoHelpfull: Yes(0) No(0)
- 3) 2/3+1=5/3 19/6+2=31/6 23/3+3=32/3 65/6+4=89/6
- 9 years agoHelpfull: Yes(0) No(0)
- 14) there are 3 Pattern
1st 33+8=41
2nd. 46+21=67
3rd. 72+47=119
since 33-8=25
46-21=25
- 9 years agoHelpfull: Yes(0) No(1)
- 1.23
2.4
3.89/6
4.1516
5.9
6.465
7.38
8.1
9.??
10.38 if 6 replaced by 8
11.64/9
12.1.2
13.28
14.99
15.183
16.??
17.10.7
18.-63
- 9 years agoHelpfull: Yes(0) No(3)
- 7 ans 32
(8,3)------------8-3=5
(12,48)--------128*4=48
(29,?)----------32-29=3
- 9 years agoHelpfull: Yes(0) No(3)
- Q.6)
you have two series
1st=(5,25,30,150,155,?)
2nd=(10,15,75,80,400)
for first series=
5*5=25 , 25+5=30 , 30*5=150 , 150+5=155 , 155*5=775
for Second series=
10+5=15 , 15*5=75 , 75+5=80 , 80*5=400
answer is 775
NOTE (YOU HAVE TO ADD 5 AND THEN MULTIPLY BY 5 TO NEXT THE SERIES IN ALTERNATE ORDER) - 9 years agoHelpfull: Yes(0) No(0)
- 5/3 - 2/3 = 3 /3 =1
19/6 - 31/6 = 12/6 = 2
23/3 - 32/3 = 9/3 = 3
so 65/6 -x = 4 ==> x=41/6 - 9 years agoHelpfull: Yes(0) No(0)
- QES6}
This consists of two series:
i)5,25,,30,150,155,?(775) Mutiply by 5 and then add 5
ii)10,15,75,80,400,405 same in this..
- 9 years agoHelpfull: Yes(0) No(0)
- 9)2,1,2,3,8,0,1,9,1,2,?
Take first four numbers 2+1+2+3=8
Take next three numbers 8+0+1=9
Then take next three numbers 1+2=3
Hence answer is 3 - 9 years agoHelpfull: Yes(0) No(1)
- 2/3 19/6 23/3 65/6
5/3 31/6 32/3 x/6
2series-1series then we are getting 1,2,3,4 65-x/6=4
41/6
- 9 years agoHelpfull: Yes(0) No(0)
- 14)seprate them as groups (33,8,41)(46,21,67)(72,47,119)(124,?,?x)
33+8=41
+26
46+21=67
+52=(26*2)
72+47=119
+78 =(26*3)
124+?=197
then ?=197-124
73
ans is 73 - 9 years agoHelpfull: Yes(0) No(0)
- 3)2/3, 5/3,19/6,31/6,23/3,32/3,65/6,?
2/3-5/3 = -3/3 = -1
19/6-31/6= -12/6 = -2
23/3 - 32/3 = -9/3 = -3
65/6 - 89/6 = -24/6 = -4
so answer is 89/6
- 7 years agoHelpfull: Yes(0) No(0)
- 6) 5,10,25,15,30,75,150,80,155,400,?
Ans:
two series First series (5,25,30,150,155,?)
Second Series(10,15,75,80,400)
5*5=25,25+5=30,30*5=150,150+5=155,155*5=775.
- 7 years agoHelpfull: Yes(0) No(0)
- 3.
5/3-2/3=1,31/6-19/6=2,32/3-23/3=3,
similarly, 65/6-x=4 so, x= 65/6-4=41/6 - 7 years agoHelpfull: Yes(0) No(0)
- 14.PLZZ VERIFY THIS SOLUTION
suppose the series is
33,8,41,46,21,67,72,47,119,124,x,y
33+8=41 67-41=26
119-67=52
46+21=67 y-119=78
72+47=119 y=197
124+x=y
x=197-124
x=73 - 7 years agoHelpfull: Yes(0) No(1)
- for question :3
2/3-5/3=1
19/6-31/6=2
23/3-32/3=3
65/6-X=4
then,X=89/6 - 7 years agoHelpfull: Yes(0) No(0)
- 6. 5,10,25,15,30,75,150,80,155,400,? ans= 575
5x5 = 25 and 25+5 = 30..
so 155x5 = 575 - 7 years agoHelpfull: Yes(0) No(0)
- 9)2,1,2,3,8,0,1,9,1,2,?
2^1=2
2^3=8
8^0=1
1^9=1
1^2=1 - 5 years agoHelpfull: Yes(0) No(0)
IBM Other Question
A shop sells 17/36 of the total amount of item A, 15/84 of the total amount of item B, and 3/504 of the total amount of item C. The shop buys back an amount equal to 2/36 of item A. What total fraction of items A, B, and C does the store currently have?
a) 303/504
b) 331/504
c) 24/84
d) 329/504
e) 15/36
In A,B,C are having some marbles with each of them. A has giben B and C the same number of marbles they already have to each of them. then, B gave C and A the same no. of marbles they have, then C gave A and B the same no. of marbles they have. At the end A,B,and C have equal no. of marbles. (i) If x,y,z are the marbles initially with A,B,C respectively. then the no of marbles B have at the end (a) 2(x-y-z) (b) 4(x-y-z) etc. (ii)If the total no. of marbles are 72, then the no. of marbles with A at the starting