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

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(#M40002280) TCS question Keep an EYE

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

Asked In TCS manjuladevi (12 years ago)

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Bunny  (12 years ago)

It Consists 2 Series...3,7,15,32 One Series 22,45,X Another Series...Both Follow Same Rule 3*2+1=7,7*2+1=15,15*2+1=31
22*2+1=45 sO mISSING nUM Is 45*2+1=91

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kumar anand  (12 years ago)

ans is 91
3*2+1=7
7*2+1=15
15*2+1=31
and next series 22*2+1=45,45*2+1=91

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Sourav Majumder  (12 years ago)

it will be 91.
logic-there is two series...
the sequence is in =2*i+1
1:3,
7=2*3+1,
15=2*7+1,
31=2*15+1
same order is the second one.22,45,
so it will be
2*45+1=91

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Ambika Prasad Tiwari  (12 years ago)

in alternate term we find a series
3+4=7,7+2*4=15,15+2*8=31
s0 22+23=45,45+2*23=91
so missing term is 91

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ajay verma  (12 years ago)

3,22,7,45,15,91,31

as u can see ever 1 digit*2+1=3rd digit and so on by this combination we get the result 91 ie; 45*2+1

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y.veera sekhar rao  (12 years ago)

3*2+7 ->7, 7*2+1 ->15 similarly
22*2+1 ->45 so ans is 45*2+1=91

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archana gupta  (12 years ago)

91, as it follows a series of no.*2+1, eg.22*2+1=45,45*2+1=91

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abhishek arora  (12 years ago)

it is a fibbonacci series...whch cnsists of 2 series in itself..in this ques 1st series is 3,7,15,31 and 2nd series is 22,45,?
in 1st series we can see that 7-3=4,thn 15-7=8 nd 31-15=16...luking at this we can see that the diff is being multiplied by 2 for the next diff...
nw 2nd series 45-22=23..so the next diff should be 23*2=46...nd 46+45=91..so 91 is the answer

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geetha  (12 years ago)

ans is 91
3+4=7,22+23=45,7+8=15,45+46=91,15+16=31

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naresh g  (12 years ago)

ans:91
here 2 pairs are available
i.e(3,7,15,31) and (22,45,?)
in first pair 3*2+1=7 7*2+1=15...
in second pair 22*2+1=45 45*2+1=91

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Anurag patsariya  (12 years ago)

91 sooooooo simple :)

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