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Subject :Sam    Class : Sample

Look at the given pattern.

3, 7, 15, 31, 63, .....

What is the 7th term in the pattern ?

(A) 127

(B) 128

(C) 255

(D) 258
the blank is given on the 6th term.but in the question it is asked for the 7th term hence i answered 255but later when i reviewed it says the answer is 127which is the answer for the 6 th term of the series hence requesting to clear this confusion

Ans 1:

Class : Class 7
can somebody explain the logic to be used in this question to get the answer as"c"

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