Government Question:

Find the wrong number in this series....
7,28,63,124,215,342?

7
7 is a prime number.

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I lost my chalaan reciept and all other documents related to PO exam bt ony have registration number slip...and now i have cleared my IBPS PO/MTS exam.. are these documnts are mandatory for that interview... while coming back after giving exam someone stole my baf in whic all those documents were.. so wat to do now?	Who is the first prime minister of India?