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: