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how to improve calculation speed?

how many employees are railway department

How to prepare for RCs o score well?

which book to refer for sbi po 2016 reasoning and data interpretation of

anyone purchased the complete cracku course?? is it worth purchasing ?

how to get >90% accuracy in rc and sufficient no of attempts. Most of the times it so happens that i boil down to two choices and mark the wrong one. Pls help.

https://cracku.in/cat/history/1260707.Can you pls explain Q1 in the Test set given in the URL diagrammatically

https://cracku.in/cat/history/1236664. Can you pls explain Q2 in the Test set given in the URL diagrammatically

what is formula for (a-b)^2..
it's answer is a^2+b^2-2ab...
then how can it be a^2+b^2-4ab. . !!
can u plz explain

https://cracku.in/cat/history/1269514. Can u Please elaborate on the solution of the 5th Question.