Latest IBM Aptitude Question SOLUTION: Q. What is the next number of the following sequnces 1. 4,3,6,5,11,10,19,18,30,29,? 2. 3,4.5,7,4,6,8.5,7.5,10,6,? 3. -12,6,-15,-5,18,-14,9,3,-18,? 4. 4.2,26.0,8.9,8.4,52.0,17.8

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Q. What is the next number of the following sequnces

1. 4,3,6,5,11,10,19,18,30,29,?

2. 3,4.5,7,4,6,8.5,7.5,10,6,?

3. -12,6,-15,-5,18,-14,9,3,-18,?

4. 4.2,26.0,8.9,8.4,52.0,17.8,16.8,104.0,?

5. 1370,1320,1070,-180,?

6. 0.5,2,3,4.5,6.75,?

7. 18,6,24,4,30,10,12,2,6,?

8. 1,1,3,9,11,121,?

9. 48,24,35,7,16,8,75,15,80,?

10. 1.8,3,0.6,2.5,5,0.5,3.4,2,1.7,4.8,6?

11. 30.5,31,30,0,67.2,67,70,100,183.9,?

Asked In IBM yojana (10 years ago)

Unsolved Read Solution (23)

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Pragati Prataprao Deshmukh  (10 years ago)

1> 4-1=3 and 3+3=6
6-1=5 and 5+6=11
11-1=10 and 10+9=19
19-1=18 and 18+12=30
30-1=29 and 29+15=44
so the next no in series is 44

Is this solution Helpfull? Yes (16) | No (4)  

Aakanksha Gupta  (10 years ago)

5) 1370-1320=50
1320-1070=250=(50*5)
1070-(-180)=1250=(250*5)
-180-(-6430)=6250=(1250*5)

so,ans=-6430

Is this solution Helpfull? Yes (13) | No   

Hiteshu Sharma  (10 years ago)

6).5+1.5=2
3+1.5=4.5
6.75+1.5=8.25
ans is 8.25

Is this solution Helpfull? Yes (8) | No (2)  

SANTOSH KUMAR  (10 years ago)

Explaination of answers:
4) (4.2,26.0,8.9),(8.4,52.0,17.8),(16.8,104.0,...)
4.2*2=8.4
26.0*2=52.0
8.9*2=17.8
Then,
8.4*2=16.8
52.0*2=104.0
17.8*2=35.6

Is this solution Helpfull? Yes (8) | No (1)  

ankit pandey  (10 years ago)

Ans no.8:
there is series of square and then plus 2.
1 =1
1^2=1
1+2=3
3^2=9
9+2=11
11^2=121
121+2=123
So the ans is 123....

Is this solution Helpfull? Yes (7) | No (1)  

SANTOSH KUMAR  (10 years ago)

1)44
2)8.5
4)35.6
5)-6430
7)2
8)123
9)40
10)0.8

Is this solution Helpfull? Yes (6) | No (1)  

SANTOSH KUMAR  (10 years ago)

Explanation of answers:
7)(18,6),(24,4),(30,10),(12,2),(6,...) answer - 2
18/3=6
24/6=4
30/3=10
12/6=2
6/3=2

Is this solution Helpfull? Yes (5) | No (1)  

SANTOSH KUMAR  (10 years ago)

Explanation of answer:
9) (48,24),(35,7),(16,8),(75,15),(80,...) answer : 40
48/2=24
35/5=7
16/2=8
75/5=15
80/2=40

Is this solution Helpfull? Yes (5) | No (1)  

SANTOSH KUMAR  (10 years ago)

Explanation of answer :
10) (1.8,3,0.6),(2.5,5,0.5),(3.4,2,1.7),(4.8,6,...) answer : 0.8
pattern is like (a,b,c) : a/b=c
1.8/3=0.6
2.5/5=0.5
3.4/2=1.7
similarly,
4.8/6=0.8

Is this solution Helpfull? Yes (5) | No   

soubhagya laxmi kar  (10 years ago)

ans for qus1:
4-3=1,6-3=3(i.e.3*1=3)
6-5=1,11-5=6(i.e.3*2=6)
11-10=1,19-10=9(i.e.3*3=9)
19-18=1,30-18=12(i.e.3*4=12)
30-29=1, by seeing this series it is conform that next multiple of 3 is (3*5=15)
so the next no must be 29+15=44.

so the ans:44

Is this solution Helpfull? Yes (4) | No (1)  

SANTOSH KUMAR  (10 years ago)

Explanation of answers:
5)1370,1320,1070,-180,...
1370-50=1320
1320-(50*5)=1070
1070-(50*5*5)=-180
-180-(50*5*5*5)=-6430

Is this solution Helpfull? Yes (4) | No (1)  

nadiya  (10 years ago)

ans:184.4
(30.5,31,30)0(67.2,67,70)100(183.9,_,_)
30.5+0.5=31 ;31-1=30
67.2-0.2=67; 67+3=70
like that repeats
183.9+0.5=184.4(ans)

Is this solution Helpfull? Yes (2) | No (4)  

Narasimha  (9 years ago)

Question 2) Answer 9
Explanation
------------------------------------------------------------------------------------------
3,4,5,6 is a separate series (which has no relation with the answer anyway)
set 1------> (4.5,7) diff. is 2.5 --> Decimal followed by Number
set 2------>(6,8.5) diff. is 2.5 --> Number followed by Decimal
set 3------>(7.5,10) diff. is 2.5 --> Decimal followed by Number
set 4------>(?,?) --> Number followed by Decimal(Obviously)

If you look carefully,

adding 1 to the Number in set 1(7) gives the Whole part of Decimal in set 2(8 in 8.5)
adding 1 to the Number in set 2(6) gives the Whole part of Decimal in set 3(7 in 7.5)
adding 1 to the Number in set 3(10) gives the Whole part of Decimal in set 2(11 in 11.5)
so if you have to get 11.5 as Decimal in set 4 the Number should be 9

Finally set 4------>(9,11.5)
------------------------------------------------------------------------------------------
Hence 9 is the answer

Is this solution Helpfull? Yes (2) | No   

Arvind  (10 years ago)

ans 1:4+2=6, 6+5=11, 11+8=19, 19+11=30 n 30 +14=44...

ans 9: 24*2=48, 7*5=35, 8*2=16, 15*5=75, n the ans is: 40*2=80.. 40 is the ans

Is this solution Helpfull? Yes (1) | No   

Sravya  (10 years ago)

8Q ans: 1,1,3,9,11,121 = 1,1^2,3,3^2,11,11^2.

1,3,11 sequence difference are 2,8 = 2,2^3.
so next will 8^3 = 512
so the ans is : 512+11 = 523

Is this solution Helpfull? Yes | No (6)  

nadiya  (10 years ago)

santosh can u give explanation to ur answers?

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angle  (10 years ago)

plz provide the solution of third series

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Sumit Sainy  (10 years ago)

give me explanation of series Q-2nd and 3rd.

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Jyoti Gupta  (10 years ago)

please tell the soln of 2,3 and 11

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nadiya  (10 years ago)

2)8.5
(3,4.5,7),(4,6,8.5),(7.5,10,6),_ observe the 1st terms of the series 3+1=4 like that 7.5+1=8.5
3)-18/-2=9

Is this solution Helpfull? Yes | No (2)  

saurabh singh  (9 years ago)

6-ans-10.125
.5*1.5=3,
3*1.5=4.5,
4.5*1.5=6.75,
6.75*1.5=10.125

Is this solution Helpfull? Yes | No (1)  

Narasimha  (9 years ago)

Please refer this answer, there is a small typing mistake in my previous answer.
Question 2) Answer 9
Explanation
------------------------------------------------------------------------------------------
3,4,5,6 is a separate series (which has no relation with the answer anyway)
set 1------> (4.5,7) diff. is 2.5 --> Decimal followed by Number
set 2------>(6,8.5) diff. is 2.5 --> Number followed by Decimal
set 3------>(7.5,10) diff. is 2.5 --> Decimal followed by Number
set 4------>(?,?) --> Number followed by Decimal(Obviously)

If you look carefully,

adding 1 to the Number in set 1(7) gives the Whole part of Decimal in set 2(8 in 8.5)
adding 1 to the Number in set 2(6) gives the Whole part of Decimal in set 3(7 in 7.5)
adding 1 to the Number in set 3(10) gives the Whole part of Decimal in set 4(11 in 11.5)
so if you have to get 11.5 as Decimal in set 4 the Number should be 9

Finally set 4------>(9,11.5)
------------------------------------------------------------------------------------------
Hence 9 is the answer

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  (6 years ago)

11)

(30.5, 31), (30,0) , (67.2 , 67), (70, 100), (189.9 , ?)

(30.5, 31) >> increased by 0.5
(30,0) >> increased by 30
(67.2 , 67) >> decreased by 0.2
(70, 100) >> increased by 30
(189.9 , ?) >> from the first and the third couples we can see that -0.7 is the number what the followings.

means: first +0.5
third - 0.2
difference between them -0.7
so, fifth couple : difference second and -0.7 is -0.9

ans= 189.9- 0.9 = 183

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