IBM
Company
Numerical Ability
Sequence and Series
Q. What is the next number of the following sequence
-12,6,-15,-5,28,-14,9,3,-18,___
Read Solution (Total 8)
-
- -12/-2=6
-15/3=-5
28/-2=14
9/3=3
-18/-2=9
so, ans is 9
- 11 years agoHelpfull: Yes(20) No(0)
- 6*(-2)=-12,(-5)*3=-15,(-14)*(-2)=28,3*3=9
so the series is -2,3,-2,3
so the next 9*(-2)=-18.the next number is 9.
- 11 years agoHelpfull: Yes(15) No(1)
- Look upon the series carefully
-12,6.....-15,-5......28,-14.....9,3.....-18,___
-12/6 = -2
-15/-5 = 3
28/-14= -2
9 / 3 = 3
similarly
-18/x = -2
x = 9
So ans will be 9
- 11 years agoHelpfull: Yes(6) No(0)
- -12,6,-15,-5,28,-14,9,3,-18,___
-12/6 = -2
-15/-5 = 3
28/-14 = -2
9/3 = 3
-18/? = -2
PUT THE VALUE OF ? IS 9
SO -18/9 = -2
SO ANS IS 9 - 11 years agoHelpfull: Yes(1) No(0)
- -12/6=-2
-15/-5 = 3
28/-14 = -2
9/3 = 3
-18/x = -2 ... x=9(ans) - 10 years agoHelpfull: Yes(1) No(0)
- (-12,6)(-15,-5)(28,-14)(9,3)(-18,x)
observe the pattern the right side value of each pair is 2,3 respectively of left side value..and the product of their sign are alternating i.e for first pair -,then +,-,+ so next would be -
and x=would be 9 as 9*2=18. - 11 years agoHelpfull: Yes(0) No(0)
- a,a/2,b,b/3......
a=-18
next will be (-18/2)= -9 - 11 years agoHelpfull: Yes(0) No(2)
- ans 9
-12,(-12/-2),-15,(-15/3),28,(28/-2),9,(9/3),-18,(-18/-2) - 9 years agoHelpfull: Yes(0) No(0)
IBM Other Question
Q. What is the next number of the following sequence
7/6,3/2,1,5/6,13/6,5/2
Q. What is the next number of the following seuqnece
-5, 1, -11, 23, 29, 17, -20, -14,.... ?