IBM Company Logical Reasoning Number Series

1.8,3,0.6,2.5,5,0.5,3.4,2,1.7,_?

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1.8,3,0.6,2.5,5,0.5,3.4,2,1.7,? 1) .7 , 1.2, 1.2 , 2.2 , 1.7, 3.2, 2.2, 4.2 , ? .7+.5=1.2+.5=1.7 ans 2.7
2) 81, 9^2, 162, 49, 7^2, 98, 25, 5^2, 50, 64, 8^2 ? 81*2=162 so,ans = 64*2= 128 3) 1, 1, 2, 4 , 6, 36, 39, 1521, ? 1+1=2 4+2=6 36+3=39 1521+4= 1525 (ans)
4) 2, 3, 10, 15, 26, 35,50, ?
5) 2, 8, 3, 27, 4, 64, 5, 125, 6, 216, ? See alternate no.s -> 2, 3, 4.ans=7
6) 2, 3, 6, 13, 28, ? *2-1, *2+0, *2+1.ans= 28*2+3= 59
7) 38, 36, 76, 35, 114, 34, ? Alternate -> 38+38=76 76+38=114 114+38=152 (ans) 1/5, 1/2, 1/3, 2/5 , 1, 2/3,3/5, 3/2, 1, 4/5, ? Alternate starting with 1/2 ; skip 2 and � -> 1/2, 1, 3/2 , 2 (ans =2)
9) 96, 64, 128, 192, 128, 256, 288, 192, ? Break such questions like this (96, 64, 128,) (192, 128, 256,) (288, 192, ?) First*2=second set's numbers. First*3= third set. Ans=128*3
10) 1370, 1320, 1070, -180, ? difference -> -50, -250, -1250 -> 50*5, 250*5, next will be -1250*5
11) 3, 2, 1, 4, 5, 4, 5, 1, 0, 6, 3, 2, ? 3,( 2, 1), 4,( 5, 4), 5, (1, 0), 6, (3, ?) second term one less . so ans = 2
12) 1 1 1 2 2 2 3 4 3 3 5 6 ? (1 1) 1 2 (2 2) 3 4 (3 3) 5 6 ? ans=4
13) 507, 169, 248, 62, 36, 12, 168, 42, 168 ? (507= 169*3), 248, 62, (36=12*3), 168, 42, (168=x*3)-> x=56 (ans)
14) 7.2, 2.2, 3.2, 16, 11, 12, 60, 55, 56, ? 7.2 + 8.8= 16+ 44= 60 + 2.2= 62.2 (ans) [not sure abt answer]
15) 2, 6, 5, 14, 11, 26, 17 , ? Alternate starting with first: +3 , +6 , +6 Now starting with second number: +8, +12 , +12 . so ans = 26+12
16) 115, 100, 86, 74, 65, 60, ? Difference : 15, 14, 12,9, 5 Now difference of these : 1, 2, 3, 4, next 5 So 5-5=0 Ans=60-0=60
17) 8 5 9 7 2 25 5 1 16 8 6 ? (8 -5=3 ) -> 3^2=9 (7-2=5)->5^2= 25 5 1 16 (8- 6=2) so answer 2^2=4 18) -5 1 -11 23 29 17 -20 -14 ? -5 (1 -12=-11) 23 (29 -12=17) -20 (-14 -12=-26) ans=-26
---------------------------------------------------------------------------------------------------------- SECTION 1: Number series: a)3,7,10,8,4,12,0,5,5,3,2,? Ans:(Divide the 3 elements into one group ) 3+7=10,8+4=12,0+5=5,so 3+2=5 is the answer. b)0,1,1,2,0.5,2,2,4,2,2,4,3,7,2,?
c)1,1,2,4,6,36,39,1521,?
d)7,4,6,3,4.5,1.5,2.25,? Ans: -0.75
e)2,9,5,49,11,169,? Ans:22
f)49,7,98,16,4,48,9,3,36,25,5,?
g)2,6,5,14,11,26,17,? Ans:60
h)7,0,1,8,5,12,9,26,3,23,2,? Ans:28
i)2,3,10,15,26,? Ans:35
j)5,16,22,68,28,87,36,106,11,? Ans:45
k)7776,625,64,9,?
l)13,24,36,23,34,56,33,44,96,43,54,? Ans:116
m)0,1,2,0.5,2,2,2,2,4,3,2,? Ans:3.5
n)18,24,5,21,27,8,17,23,4,24,30,? Ans:9
o)3,5,2,100,4,7,3,196,1,6,5,? Ans:144
p)8,5,9,7,2,25,5,1,16,8,6,? Ans:15
q)-3,6,1,-2,4,-1,-1,2,-3,? r)1/4,1/4,1/2,3/2,6,? Ans:30 I don't know the exact answer for these problems these are the answers I have got while I solved the paper..Please check it once then sec 2 was,

SECTION 2: Quants: They were mainly concentrate on following topics.They are, a)Time and distance. b)Time and work. c)Profit and loss. 4)Percentages. 5)Ratio and Proportion and 6)Ages.
1) 1/4, 1/4, 1/2, 3/2, 6, ?
2) 0.8, 1.8, 3.6, 3.6, 4.6, 9.2, 9.2, 10.2, ?
3) 22, 19.5, 21.45, 33, 30.5, 33.55, 44, 41.5, ?
4) 15 3/4, 16, 26, 9 1/5, 9, 19, 64 2/3, 65, 75, 30 3/8, ?
5) 3, 2, 1, 4, 5, 4, 5, 1, 0, 6, 3, ?
6) 3/2, 2 1/4, 9/4, 7/2, 12 1/4, 49/4, 4/3, 1 1/7, 16/9, ?
7) 18, 24, 5, 21, 27, 8, 17, 23, 4, 24, 30, ?
100, 98, 95, 90, 83, ?
9) 1, 3, 3, 2, 8, 10, 3, 4, 12, 4, 8, ?
10) 49, 7, 98, 16, 4, 48, 9, 3, 36, 25, 5, ?
11) 9, 12, 4, 8, 12, 15, 5, 9, 3, 6, 2, 6, 6, 9, ?
12) 5/6, 1/3, 1/2, 1/2, 2/8, 1/4, 5/6, 1/6, 2/3, 1/2, 1/3, ?
13) 33, 8, 41, 21, 67, 72, 47, 119, 124, ?
14) 1/7, 3/4, 4/9, 5/6, 7/11, 7/8, ?
15) 7, 4, 6, 3, 4.5, 1.5, 2.25, -0.75, ?

more Questions which I remember
1)8,0.5,16,4,15,0.3,50,4.5,6,0.2,30,?
2)9,4,16,6,36,21,441,? Ans:421
3)4,2,5,9,5,11,13,7,16,17,9,?
4)33,8,41,46,21,67,72,47,119,124,?
5)3,2,1,4,5,4,1,0,6,3,?
6)30.5,31,30,0,67.2,67,70,100,183.9?
7)48,24,35,7,16,8,75,15,80,40,?
8)1.8,3,0,6,2.5,5,0.5,3.4,2,1.7,4.8,6,? Ans=0.8
9)1370,1320,1070,-180,?
10)49,7,98,16,4,48,9,3,36,25,5,? Ans=125