WBCS 2021 Mains (General Studies Paper-IV) Prev. Yr. Paper (24-May-2022)

Which of the following ratios is the greatest?

A certain sum of money amounts to $\text{Rs. }1,680$ in $3$ years and to $\text{Rs. }1,800$ in $5$ years. Find the sum and the rate of simple interest.

$ABCD$ is a quadrilateral in which $P$, $Q$, $R$ and $S$ are the mid-points of sides $AB$, $BC$, $CD$ and $DA$ respectively. Then $PQRS$ is a:

A milkman has $21\text{litres}$ of whole milk, $42\text{litres}$ of toned milk and $63\text{litres}$ of double toned milk. If he wants to pack the three types of milk in cans so that in no can two types of milk are mixed, then what is the minimum number of cans he would require?

If $a=999$, $b=998$, $c=997$, then the value of $a^3+b^3+c^3-3abc$ will be: