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hey guyz there is no more updated test series in ssc or cat

online test series

How to improve my verbal?

how to solve comprehension problems , number series and seating arrangement problems?

how to solve probability questions in sbi po exams

how may i solve seating arrangement,puzzles and inequalities

how can i score in english?

how do i solve syllogisms

Hi can you please explain the approach to this question. In the video tutorials the multiplying factor is Mark Price(1-X)(power2)

but after the first updown cycle the multiplication is done with just MX(power2). This is a CAT question. 

Thanks

books and material that i can consider