IBM Series Questions:
1.) 1 ,3 ,1 ,2.5 ,5 ,1 ,4 ,5 ,4 ,8 ,7
1+3+1=5 & 5/2=2.5),(5+1+4=10 & 10/2=5),(4+8+7=19 & 19/2=9.5)
2.) 41.45 ,41.5 ,42 ,18.23 ,18.2 ,18
( ANS: 73.1)
3.) 11 ,8 ,17 ,14 ,23 ,24 ,31 ,32
ANS:
11 +6 17 +6 23 +8 31 +8 39
8 14 24 32
(11-8=+3)(17-14=+3)(23-24=-1) (31-32=-1)
so ans=39
4.) 4 ,3 ,144 ,1.5 ,2 ,9 ,3.2 ,2
ANS: 6.4*6.4
5.) 4.2 ,7.2 ,11.4 ,6.1 , 9.1 , 15.2 ,3.8 , 6.8
ANS: 10.6
6.) 1/5 , 1/2 , 1/3 , 2/5 ,1, 2/3, 3/5, 1 1/2 ,1, 4/5
ANS:
1st series= (1/5, 2/5, 3/5, 4/5)
diff bwn each term= -1/5
2nd series= (1/2, 1, 1 1/2, x)= (0.5, 1, 1.5, 2) => x=2
diff bwn each term= -0.5
3rd series= (1/3, 2/3, 1, x)= > x=4/3
diff bwn each term= -1/3
ans = 2
7.) 5, 1, 2, 8, 8, 1, 0, 9, 9, 2, 3
ANS:14
8.) 5, 1, 2, 8, 1, 0, 9, 2, 3, 14, 1, 3
ANS:18
9.) 6, 3, 3, 9, 12, 5, 7, 35, 8, 6, 2
ANS:12
10.) 24, 42, 1/2, 2, 65, 56, 1 1/5, 5/6, 73, 37
ANS:7/3
11.) 4, 2, 5, 9, 5, 11, 13, 7, 16, 17, 9
ANS:4,2,5,9,5,11,13,7,16,17,9,?
see the triplets
4,2,5 -> diff b/w 4,5 = 1
9,5,11 -> diff b/w 9,11 = 2
13,7,16 -> diff b/w 13,16 = 3
17,9,21 -> diff b/w 17,21 = 4
so the answer should be 21
12.) 8, 16, 3, 27, 4, 8, 7, 19, 2, 0, 7
ANS:
8+16+3=27
4+8+7=19
Likewise, 2+0+7=9
the answer is 9
13.) 5/6, 1/3, 1/2, 1/2, 2/8, 1/4, 5/6, 1/6, 2/3, 1/2, 1/3
ANS: 1/6
14.) 115, 100, 86, 74, 65, 60
ANS: 60
15.) 100, 98, 95, 90, 83
ANS: 72
16.) 0, 8, 12, 26, 23
ANS:
(0,8),(12,26),(23,?)
Difference : 8 14 x
Now, 14-8=6 -> x-14=6 -> x=20
Since, ?-23=x=20 -> ?=43 Ans.
17.) 7.2, 2.2, 3.2, 16, 11, 12, 60, 55, 56
ANS: 280
18.) 18, 24, 5, 21, 8, 27, 17, 23, 4, 24, 30
ANS:
18+6=24,24-19=5
21+6=27,27-19=8
17+6=23,23-19=4
24+6=30,30-19=11
so 11 is the next term.
1) .7 , 1.2, 1.2 , 2.2 , 1.7, 3.2, 2.2, 4.2 , ?
ANS: 2.7
2) 81, 9^2, 162, 49, 7^2, 98, 25, 5^2, 50, 64, 8^2 ?
ANS: 128
3) 1, 1, 2, 4 , 6, 36, 39, 1521, ?
ANS: 1525
4) 2, 3, 10, 15, 26, 35,50, ?
ANS: 63
5) 2, 8, 3, 27, 4, 64, 5, 125, 6, 216, ?
ANS: 7
6) 2, 3, 6, 13, 28, ?
ANS:
2, 3, 6, 13, 28, ?
diff are : 1, 3, 7, 15, 31
1*2+1=3
3*2+1=7
7*2+1=15
15*2+1=31
So Ans will be: 28+31 =59
7) 38, 36, 76, 35, 114, 34, ?
ANS: 152
8) 1/5, 1/2, 1/3, 2/5 , 1, 2/3,3/5, 3/2, 1, 4/5, ?
ANS: 2
9) 96, 64, 128, 192, 128, 256, 288, 192, ?
ANS: 384
10) 1370, 1320, 1070, -180, ?
11) 3, 2, 1, 4, 5, 4, 5, 1, 0, 6, 3, 2, ?
ANS: 7
12) 1 1 1 2 2 2 3 4 3 3 5 6 ?
ANS: 4
13) 507, 169, 248, 62, 36, 12, 168, 42, 168 ?
ANS: 56
14) 7.2, 2.2, 3.2, 16, 11, 12, 60, 55, 56, ?
ANS: 280
15) 2, 6, 5, 14, 11, 26, 17 , ?
ANS:
2,5,26 is 1 series 5=2*2+1 and 26=5*5+1
6,11,17 is another series 11=6*2-1 17=6*3-1
16) 115, 100, 86, 74, 65, 60, ?
ANS: 60
17) 8 5 9 7 2 25 5 1 16 8 6 ?
ANS:
4
18) -5 1 -11 23 29 17 -20 -14 ?
ANS: 23
a) 3,7,10,8,4,12,0,5,5,3,2,?
ANS: 5
b) 0,1,1,2,0.5,2,2,4,2,2,4,3,7,2,?
ANS: 3.5
c) 1,1,2,4,6,36,39,1521,?
ANS: 1525
d) 7,4,6,3,4.5,1.5,2.25,?
ANS: -0.75
e) 2,9,5,49,11,169,?
Ans:17
f) 49,7,98,16,4,48,9,3,36,25,5,?
ANS: 125
g) 2,6,5,14,11,26,17,?
ANS: 38
h) 7,0,1,8,5,12,9,26,3,23,2,?
ANS: 28
i) 2,3,10,15,26,?
ANS:
Ans= 35
(1^2)+1=2
(2^2)-1=3
(3^2)+1=10
(4^2)-1=15
(5^2)+1=26
(6^2)-1=35
j) 5,16,22,68,28,87,36,106,11,?
ANS:
5*3=15+1=16
22*3=66+2=68
28*3=84+3=87
36*3=108+4=112
11*3=33+5=38
ans is 38
k) 7776,625,64,9,?
l) 13,24,36,23,34,56,33,44,96,43,54,? Ans:116
The above series can be separated into
13,23,33,43
24,34,44,54
36,56,96,156
so the next series would be 53,64,236
m) 0,1,2,0.5,2,2,2,2,4,3,2,? Ans:3.5
ANS:
0+1=1/2=0.5
n) 18,24,5,21,27,8,17,23,4,24,30,?
Ans:9
first of all the series will be 18,24,5,21,27,8,17,23,4,24,30,?
The solution is...
18+6=24,24-19=5
21+6=27,27-19=8
17+6=23,23-19=4
24+6=30,30-19=11
so 11 is the next term.
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: 4
q) -3,6,1,-2,4,-1,-1,2,-3,?
r) 1/4,1/4,1/2,3/2,6,?
Ans:30
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, ?
8) 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, ?
1) 1,2,3,6,11,20,37,68,_____
(sum of previous two+ current face value Ans=20+37+68)
2)9,3,24,4,9,3,36,6,9,3,30,____
(pattern is x*3,x*6 Ans=5)
3)44,4.4,.88,.264,0.1056,____
(x*.1,x*.2,x*.3.....Ans=0.5*0.1056)
4)38,36,76,35,114,34,____
(Ans=38*4)
5)-12,6,-15,-5,28,-14,9,3,-18,____
(Ans=9)
6)5,1,2,8,8,1,0,9,9,2,3,______
(Ans=14)
7)56,89,33,21,57,88,35,19,60,85,30,____
(Ans=24)
8)3,4.5,7,4,6,5.5,5,7.5,10,6,______
(Ans=9.0)
9)7,-35,-34,-3,15,16,4,________
(Ans=-20)
10)11,8,17,14,23,24,31,32,______
(Ans=43)
11)1.8,3,0.6,2.5,5,0.5,3.4,2,1.7,____
(Ans=4.5)
12)1,2,3,611,20,37,68,________
(This question got repeated for me twice same as 1)
13)9,3,6,21,9,12,33,15,________
(Ans= 33-15)
14)-16,-8,4,24,12,-6,-40,_______
(Ans=-20)
15)4.2,26.0,8.9,8.4,52.0,17.8,16.8,104.0,_______
(Ans=17.8*2)
16)340,680,1428,3141.6,________
17)7,-14,-4,15,-30,-20,-21
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,?
Some of additional questions asked in previous interviews:
-> 9,3,24,4,9,3,36,6,9,3,30,?
-> 52,62,42,78,89,68,49,61,39,63,76,?
-> -16,-8,4,24,12,-6,-40,?
-> 49,6,25,4,36,5,81,5,?
-> 9,3,6,21,9,12,33,15,18,?
-> 12,3,15,14,6,19,9,23,18,12,?
-> -15,-14,34,32,-42,-39,58,54,-61,?
-> 38,36,76,35,114,34,?
-> 30.5,31,30,0,67.2,67,70,100,183.9,?
-> 11,8,17,14,23,24,31,32,?
-> 10,12,-36,-7,-5,15,19,21,?
-> 44,4.4,0.88,0.264,0.1056,?
-> 11.5,17.5,35.5,89.5,?
-> 2,3,10,15,26,35,50,?
-> 1/3,1/2,1/4,2 1/3,3 1/2, 4 1/4, 4 1/3, 6 1/2,?
-> 1.25,3,7.1,1.5,1,8.1,1.75,-1,9.1,0.75,2. 00
-> 5,1,2,8,1,0,9,2,3,14,1.3,2,?
