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(36 to 40) M.Laxmikanth (President) Polity Facts in a Doubt Destroyer Manner.
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Let's Continue this very important course guys.

Rahul Agrawal is teaching live on Unacademy Plus

Rahul Agrawal
The Ultimate Doubt Destroyer on Unacademy. One of the Top Educator on the Unacademy platform. Famous for Doubt destroyer series.

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for the 1st question we can also do as (11-1=10) ×( 11+1=12) and so on..