IBM
Company
Logical Reasoning
Number Series
Q. What is the next number of the following sequences.
1. 7,-35,-34,-3,15,16,4,....
2. 6,9,11,13,17,20,22,24,28,....
3. 4,3,6,5,11,10,19,18,30,29,....
4. 5,6,6.5,8,7,9.5,.....
5. 507,169,248,62,36,12,168,42,168,....
6. 1,3,1,2.5,5,1,4,5,4,8,7,.....
7. -3,6,1,-2,4,-1,-1,2,-3,.....
8. 18,24,5,21,27,8,17,23,4,24,30,.....
9. 1,9,0,2,7,1,3,5,2,4,3,....
10. 9,4,16,6,36,21,441,.....
11. 9,12,4,8,12,15,5,9,3,6,2,6,6,9,.....
12. 7.2,2.2,3.2,16,11,12,60,55,56,.....
13. 7,0,1,8,5,12,9,26,3,23,2,.....
14. 4,3,144,1.5,2,9,5,0.3,2.25,3.2,2,....
15. 0,1,2,0.5,2,2,2,2,4,3,2,.....
Read Solution (Total 29)
-
- 1.7,-35,-34,-3,15,14,4....
ans -20
7*-5=-35
-35+1=34
-3*-5=15
15+1=16
4*-5=-20 - 11 years agoHelpfull: Yes(18) No(2)
- 2. 6,9,11,13,17,20,22,24,28,....
9-6=3
13-11=2
20-17=3
24-22=2
31-28=3
so answer =31....
- 11 years agoHelpfull: Yes(17) No(0)
- 3) the sequence goes -1, +3, -1, +6, -1, +9, -1, +12, -1,
Therefore the next leap should be +15
29+15= 44 NOT 43 - 11 years agoHelpfull: Yes(17) No(0)
- 5) 507/3=169
248/4=62
36/3=12
168/4=42
168/3= 56 - 11 years agoHelpfull: Yes(7) No(0)
- 9)1,9,0,2,7,1,3,5,2,4,3,
take 3 no (1,9,0)(2,7,1)(3,5,2)(4,3,)
sum gives 10 for all the sets so ans:3
14)4,3,144,1.5,2,9,5,0.3,2.25,3.2,2
4*3=12 ->12^2=144
1.5*2=3 ->3^2=9
5*0.3=1.5->1.5^2=2.25
3.2*2=6.4->6.4^2=40.96
- 11 years agoHelpfull: Yes(6) No(0)
- 7. -3,6,1,-2,4,-1,-1,2,-3,.....
Ans: Divide the series like this
-3,6,1/,-2,4,-1,/-1,2,-3/,_ _ _
First Number in each add +1
second Number series add -2
third number series add -2
ans: 0, 0, -5
Total series : -3,6,1,-2,4,-1,-1,2,-3, 0,0,-5 - 11 years agoHelpfull: Yes(6) No(4)
- 10. 9,4,16,6,36,21,441
9-4=5
16-6=10
36-21=15
441-20=421 - 11 years agoHelpfull: Yes(5) No(6)
- 5.168/3=56
6.1+3+1=5/2=2.5
5+1+4=10/2=5
4+8+7=19/2=9.5 - 11 years agoHelpfull: Yes(5) No(0)
- 13.7+0+1=8
5+12+9=26
3+23+2=28(ans) - 11 years agoHelpfull: Yes(5) No(0)
- 1.-20
2.31
3.43
4.11
5.56
6.9.5
7.0
8.11
9.3
10.421
11.3
12.280
13.27
14.40.96
15.3.5 - 11 years agoHelpfull: Yes(4) No(4)
- 8. read it as 18 (+3) 21 vertically
18 24 5
+3 +3 +3
21 27 8
-4 -4 -4
17 23 4
+7 +7 +7
24 30 11
so ans. is 11 - 11 years agoHelpfull: Yes(4) No(1)
- 8.
18 24 5(+3)
21 27 8(-4)
17 23 4(+7)
24 30 11
answer=11 - 11 years agoHelpfull: Yes(3) No(10)
- 9,12,4,8,12,15,5,9,3,6,2,6,6,9,.....
ans:-3
the series is an alternative of +3 +4
take 4terms as 2 pair
9,12 4,8 the second pair comes 12/3=4
.
.
.
.
in the same way 9/3=3 - 11 years agoHelpfull: Yes(3) No(2)
- 7.2,2.2,3.2,16,11,12,60,55,56,....
take 3 at a time...
I.e.
7.2,2.2,3.2 :
12
(7.2-2.2)=5,(2.2+1=3.2),3.2*5=16...
now , next 3..proceed in same ..16-5=11+1=12*5=60
now ,next 3...60-5=55+1=56*5=280
Ans=280 - 11 years agoHelpfull: Yes(3) No(1)
- 15:0+1=1/2=0.5
2+2=4/2=2
4+3=7/2=3.5
ans:3.5 - 11 years agoHelpfull: Yes(3) No(0)
- 6.
(1+3+1)/2=2.5
(5+1+4)/2=5
(4+8+7)/2=9.5
So the ans is 9.5 - 11 years agoHelpfull: Yes(2) No(0)
- 11)ans is 3 7 divide it to two each
9 12 4 8 12 15 5 9 3 6 2 6 6 9 ?(3 7)
(+3) (+4) (+3) (+4) (+3) (+4) (+3) (+4)
(9+12=21) 12 27 14 9 8 15 10
21+6=27 12+2=14 9+6=15 8+2=10 - 11 years agoHelpfull: Yes(2) No(0)
- 3>ans 44 43
- 11 years agoHelpfull: Yes(1) No(0)
- 1. 7, -35, -34, -3, 15, 16, 4, ? , ?
7*-5=-35, add +1 to the ans.. so, it is -34.
-3*5=15 and +1 yields 16..
like wise, 4*-5=-20 and +1 to it is -19..
Alternate negative signs !! - 11 years agoHelpfull: Yes(1) No(2)
- 0,1,2,0.5,2,2,2,2,4,3,2,..
ans:3.5
0+1/2=0.5 2+2/2=2 4+3/2=3.5 - 11 years agoHelpfull: Yes(1) No(9)
- 4. 5,6,6.5,8,7,9.5,.....
difference is -1,-.5,-1.5,1,-2.5,-3.5
ans is 13
-1-1.5=-1.5
-1.5-1=2.0 and so on............
- 11 years agoHelpfull: Yes(1) No(8)
- 14)4*3=12^2=144
similarly 3.2*2=6.4^2=40.96 - 11 years agoHelpfull: Yes(1) No(0)
- 1. 7,-35,-34,-3,15,16,4
take ist two numbers(7*-5)=-35
then leaving one take two numbers (-3*5)=15
then (4*-4)=16
so answer is -4... - 11 years agoHelpfull: Yes(0) No(3)
- answers: 1: -20
2: 31 - 11 years agoHelpfull: Yes(0) No(0)
- 10.
9,4,16,6,36,21,441,.....
ans:-16
4^2=16 16-9=5+1(6)
6^2=36 36-16=20+1(21)
21^2=441 21-6=15+1(16) - 11 years agoHelpfull: Yes(0) No(4)
- 3) 4 3 (consecutive numbers) similarly 6 5...11 10
taking 2 numbers in a set...(4,3)3+3 (6,5)5+6 (11,10) 10+9(19,18)...
ans..29+15=44 - 11 years agoHelpfull: Yes(0) No(0)
- 12) here the given series is divide into 3 parts
i.e. 7.2, 2.2, 3.2 here diff 5 get 2nd term and then add 1 get 3rd term and next series term= 3.2*5=16
16, 11, 12 in the same way as said above and 12*5=60
60, 55, 56 next=56*5=280,275,276 - 9 years agoHelpfull: Yes(0) No(0)
- 7,-35,-34,-3,15,16,4,...
7*(-5)=-35
-35+1=-34
-3*(-5)=15
15+1=16
4*(-5)=-20
Answer=-20 - 9 years agoHelpfull: Yes(0) No(0)
- -20 answer
4*5=20
- 8 years agoHelpfull: Yes(0) No(0)
IBM Other Question
Q. which is greater?
2/8, 1/2, 20%, 0.22
Q. What is the next number of the following sequences.
1. 8,5,9,7,2,25,51,16,8,6,...
2. 13,21,32,49,78,131,...