self Maths Puzzle Logical Reasoning Missing Character

3, 22 , 7, 45, 15, ? , 31...what could be @ place ?

Read Solution (Total 3)

series is like that 3 22 7 45 15 91 31...
double of previous term +1 alternatively...
13 years agoHelpfull: Yes(8) No(0)

@priyanaka:

series is like that 3 22 7 45 15 91 31...

so 1st, 3rd, 5th, 7th .... no in series are computed as double of previous not +1 for example in this series 1st no is 3 so third no will be 3*2+1 =7 same way 5th no will be 7*2+1 =15

similar logic is applied to 2nd , 4th , 6th,8th,... no in series...

series is like that 3 22 7 45 15 91 31...
double of previous term +1 alternatively...

hope this helps..
6 years agoHelpfull: Yes(1) No(0)
Can anyone explain this indetail?
6 years agoHelpfull: Yes(0) No(0)

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