Find the invalid no.from the following series 3, 7, 15, 31, 63, 123, 255  Choose the correct choice from the following options
A) 3	B) 7	C) 27	D) 63	E) 123
Go on multiplying the number by 2 and adding 1 to it to get the next number.So, 123 is wrong.   123
<result>E</result>
Find the invalid no.from the following series 3, 7, 15, 31, 63, 123, 255