Latest TCS Aptitude Question SOLUTION: . 3, 22, 7, 45, 15,? , 31

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(#M40002855) TCS question tcs Keep an EYE

. 3, 22, 7, 45, 15,? , 31

Asked In TCS purvi (12 years ago)

Unsolved Read Solution (6)

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swati kushwah  (12 years ago)

(3*2)+1=7
(7*2)+1=15
(15*2)+1=31
(22*2)+1=45
(45*2)+1=91...

ans is 91

Is this solution Helpfull? Yes (7) | No   

ashok  (12 years ago)

22-3=19
45-7=38(which is double of 19)
15+76(which is double of 38)=91ans

Is this solution Helpfull? Yes (1) | No   

mahesh  (12 years ago)

break series in to two parts as-----3,7,15,31
difference b/w two consecutive number from them as- 7-3=4,15-7=8,31-15=16
now it is new series 4,4*2=8,8*2=16,16*2=32, will be added to next similarly
for 22,45,?---->45-22=23 and 23*2=46 will added to next one that is 45 so it will become 45+46=91

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jai Narayan Mishra  (12 years ago)

answer is 91...

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radhika  (12 years ago)

91 is d ans

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Vandana Singh  (12 years ago)

91...bcoz..n*2+1

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