WBCS Mains 2018 Official Paper-VI

A merchant has $1000\text{kg}$ of sugar, part of which he sells at $8\%$ profit and the rest at $18\%$ profit. He gains $14\%$ on the whole transaction. The quantity sold at $18\%$ profit is:

If the cost price of $12$ pens is equal to the selling price of $8$ pens, the gain percentage is:

What is the smallest number to be subtracted from $549162$ in order to make it a perfect square?

If $0.04\times X=0.000016$, then $X=$ ?

If the number $97251\ast 6$ is completely divisible by $11$, then the smallest whole number in place of $\ast$ will be: