IBM
Company
Numerical Ability
Sequence and Series
Q. What is the next number of the following sequence
1. 1,3,3,2,8,10,3,4,12,4,8,?
2. 8,0.5,16,4,15,0.3,50,4.5,6,0.2,30,?
3. 5/6,1/3,1/2,1/2,2/8,1/4,5/6,1/6,2/3,1/2,1/3,?
4. 3/2,9/4,9/4,7/2,49/2,49/4,4/3,16/9,16/9,8/3,?
5. 2,6,5,14,11,26,17,?
6. 6,18,21,8,11,33,2,6,9,5,8,24,7,21,?
7. 9,4,16,6,36,21,441,?
8. 7,-35,-34,-3,15,16,4,?
9. 2,7,-35,7,12,-60,5,10,?
Read Solution (Total 24)
-
- 2.8/0.5=16,8*0.5=4
15/0.3=50, 15*0.3=4.5
6/0.2=30, 6*0.2=1.2
so ans is 1.2 - 11 years agoHelpfull: Yes(13) No(0)
- 7)(9-4)=5
(16-6)=10
36-21=15
441-20=x
x=421 - 11 years agoHelpfull: Yes(7) No(0)
- 1.) 1,3,3,2,8,10,3,4,12,4,8,?
1*3=3
2+8=10
3*4=12
4+8=12
so answer s 12 - 10 years agoHelpfull: Yes(6) No(0)
- ans: 1/6
break the series into groups taking 3elements in a group.now see the difference between the first two is the third....like....
5/6-1/3=1/2
1/2-2/8=1/4.....like this - 11 years agoHelpfull: Yes(5) No(4)
- 5.> series of prime nos : as
1st prime no , 2nd prime no*2, 3rd prime no ,4th prime no *2,.....
answer-2,3*2,5,7*2,11,13*2,17,19*2
so term = 38 - 10 years agoHelpfull: Yes(4) No(0)
- 6>.
(6*3)=18+3=21,
(8+3)=11*3=33,
(2*3)=6+3=9,
(5+3)=8*3=24,
(7*3)=21+3=24(ans) - 10 years agoHelpfull: Yes(3) No(0)
- 8).
7* -5=-35+1=-34,
-3* -5=15+1=16,
4*-5=-20+1=-19(ans) - 10 years agoHelpfull: Yes(3) No(9)
- 4. {3/2,9/4,9/4} ,{7/2,49/2,49/4} ,{4/3,16/9,16/9},{8/3,?,?}
ANS=128/9
{3/2,9/4,9/4} === {3/2,X,(3/2)^2} ===>X=((3/2)^2)*1
{7/2,49/2,49/4}==={7/2,X,(7/2)^2} ===>X=((7/2)^2)) *2
Like this
{4/3,16/9,16/9}==={4/3,X,(4/3)^2} ===>X=((4/3)^2)*1
{8/3,?,?} ==={8/3,X,(8/3)^2} ===>X=((8/3)^2)*2==>128/9
ANS=128/9 - 10 years agoHelpfull: Yes(3) No(0)
- 3. 5/6-1/3=3/6=1/2
1/2-2/8=1/4
5/6-1/6=2/3
1/2-1/3=1/6
ans:1/6 - 10 years agoHelpfull: Yes(2) No(0)
- 5.) 2,6,5,14,11,26,17,?
split it into two series.
2,5,11,17 are alternating prime numbers.
6*2=12+2=14
14*2=28-2=26
so 26*2=52+2=54
so answer s 54 - 10 years agoHelpfull: Yes(2) No(2)
- 9.) 2,7,-35,7,12,-60,5,10,?
series goes lyk +5, *(-5), /(-5)
2+5=7
7*(-5)= -35
-35/(-5)= 7
7+5=12
12*(-5)= -60
-60/(-5)= 5
5+5=10
10*(-5)= -50
so answer s -50 - 10 years agoHelpfull: Yes(2) No(4)
- 3. 5/6,1/3,1/2,1/2,2/8,1/4,5/6,1/6,2/3,1/2,1/3,?
multiple of 24 so(Ex 5/6*24=20,1/3*24=8........ 1/3*24=8)
20,8,12,12,6,6,20,4,16,12,8,?
20-8=12
12-6 = 6
20-4 = 16
12-8 = 4
so ans is 4.
4. 3/2,9/4,9/4,7/2,49/2,49/4,4/3,16/9,16/9,8/3,?
3/2*3/2=9/4
7/2*7/2=49/4
4/3*4/3=16/9
8/3*8/3=64/9
so ans is 64/9
6. 6,18,21,8,11,33,2,6,9,5,8,24,7,21,?
18/6=3 18+3=21 or 11-3=8
33/11=3
6/2 = 3 6+3 = 9 or 8-5 =3
24/8 = 3
21/7 = 3 21+3 =24
so ans is 24
9. 2,7,-35,7,12,-60,5,10,?
-35/7 = 5
-60/12 = 5
X/5 = 5
put the value of X is -50 - 10 years agoHelpfull: Yes(2) No(1)
- split the series in to two
5. 2,5,11,17 and other one is 6,14,26
in the second series 2 is multiplied by a prime number
2*3=6, leave 5 then 2*7=14, leave 11 then 2*13=26...so leave 17 and 2*19=38 will be the answer - 10 years agoHelpfull: Yes(1) No(0)
- 5>.
2*1+4=6,
5*2+4=14,
11*2+4=26,
17*2+4=38 (ans) - 10 years agoHelpfull: Yes(1) No(3)
- 2. (8=0.5*6),4,(15=0.3*50),4+0.5=4.5,(6=0.2*30),4+1=5
ans=5 - 10 years agoHelpfull: Yes(1) No(0)
- 7.16-9=7-1=6
36-16=20+1=21
441-36=405-1=404 Ans. - 10 years agoHelpfull: Yes(1) No(0)
- 8.7,-35,-34,-3,15,16,4,-20,?
Sol: 7*-5=-35+1=34
-3*-5=15+1=16
4*-5=-20(ans) - 10 years agoHelpfull: Yes(1) No(0)
- 4. (3/2)^2=9/4
9/4*1=9/4
7/2*7=49/2
49/2*1/2=49/4
.
.
.
.
8/3*8=64/3
ans= 64/3 - 11 years agoHelpfull: Yes(0) No(7)
- 9. -50(10 * (-5))
- 11 years agoHelpfull: Yes(0) No(0)
- 1. 1,3,3,2,8,10,3,4,12,4,8,?
1(3/3),2(10-8),3(12/4),4(12-8)
so answer is 12 - 11 years agoHelpfull: Yes(0) No(2)
- 9.(2,7,-35)=2-7=-5so 7*-5
(7,12,-60)=7-12=-5so 12*-5
(5,10,x)=5-10=-5 so 10*-5=-50 is the answer - 11 years agoHelpfull: Yes(0) No(0)
- 1.(1 3 3)=1*3=3
(2 8 10)=2+8=10
(3 4 12)=3*4=12
(4 8 x)=4+8=12
next number is 12 - 10 years agoHelpfull: Yes(0) No(1)
- 3.(56 13 12)=13*12=16=1-16=56
(12 28 14)=12*14=18=2*18=28
(56 16 23)=56-16=23
(12 13 x)=12*13=16
last number is 16 - 10 years agoHelpfull: Yes(0) No(0)
- 5/6,1/3,1/2,1/2,2/8,1/4,5/6,1/6,2/3,1/2,1/3,?
5/6-1/3=1/2,
1/2-2/8=1/4,
5/6-1/6=2/3,
1/2-1/3=1/6 - 10 years agoHelpfull: Yes(0) No(0)
IBM Other Question
Q. What is the next number of the following seuqnce
1.25,9,22.5,0.75,8.5,22,0.25,8
Q. Waht is the next number of the following sequence
1. 1,3,3,2,8,10,3,4,12,?
2. 7776, 625, 64,9,?
3. 7,-14,-4,15,-30,-20,-21,?
4. 7,-35, -34, -3, 15, 16, ?
5. 4,2,4,8,6,8,,16,?
6. 3,7,10,8,4,12,0,5,5,3,2,?
7. 3,2,1,4,5,4,5,1,0,6,3,2,?
8. 507,169,248,62,36,12,168,42,168,?
9. 2,3,10,15,26,35,50,?
10. 7,4,6,3,4.5,1.5,2.25,?
11. 7.2,2.2,3.2,16,11,12,60,55,56,?
12. 0.7,1.2,1.2,2.2,1.7,3.2,2.2,4.2,?