Latest TCS Aptitude Question SOLUTION: 1, 3, 5, 1, 9, -3, 13, -11, 17, .......?

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(#M40010457) TCS question Keep an EYE

1, 3, 5, 1, 9, -3, 13, -11, 17, .......?

Asked In TCS (12 years ago)

Unsolved Read Solution (7)

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krishnamurthy  (12 years ago)

Ans: -27 It is an Alternative series.
1+4=5
5+4=9
9+4=13
13+4=17

3-2 =1
1-4 =-3
-3-8=-11
-11-16=-27

Is this solution Helpfull? Yes (26) | No   

vivek chauhan  (12 years ago)

here there r 2 series first 1,5,,9,13,17.....
nd second 3,1,-3,-11.....?
3-2=1
1-4=-3
-3-8=-11
now -11-16=-27
so answr=-27

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neha gupta  (12 years ago)

-27
1+4=5
5+4=9
9+4=13
13+4=17

3-2=1
1-4=-3
-3-8=-11
-11-16=-27

Is this solution Helpfull? Yes (4) | No   

nayana s  (12 years ago)

SOLUTION IS -27.
consider alternate numbers in the above given sequence,the subtract the consecutive numbers from the selected alternative numbers..
so,
3-1=2
1-(-3)=4
-3-(-11)=8
we can suspect the diff would be 16,,
let the number to be find is x..
then,
-11-x=16
x=-27.

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keyur shah  (12 years ago)

-27.
there are two series
first-->
1+4=5,
5+4=9,
9+4=13,
13+4=17 and
second-->
3-2=1,
1-4=-4,
-3-8=-11,
-11-16=-27 thats it.

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manish kumar rai  (12 years ago)

-37 ...in this question 2 sereis 1at is 1,5,9,13,17,it add 4 to last and find next and other series is 3,1,-3,-11......in this series subtrat -2then -4then -8 then subtract -16....so-11+(-16)=-37............its my answer

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satyaprakash vengala  (12 years ago)

DIFFERENCE BETWEEN 1,5,9,13,17 IS 4 S0 NEXT NUMBER 21
DIFFERENCE BETWEEN 3,1,-3,-11 IS 2^n SO NEXT NUMBER -27

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