Find the invalid no.from the following series 3, 7, 15, 27, 63, 127, 255 Options
A) 20	B) 24	C) 27	D) 30	E) 35
Go on multiplying the number by 2 and adding 1 to it to get the next number.So, 27 is wrong.   27
<result>C</result>
Find the invalid no.from the following series 3, 7, 15, 27, 63, 127, 255