CAT (QA) PYQs

The population of a town in $2020$ was 100000. The population decreased by $y \%$ from the year $2020$ to 2021, and increased by $\mathrm{x} \%$ from the year $2021$ to 2022, where x and y are two natural numbers. If population in $2022$ was greater than the population in $2020$ and the difference between $x$ and $y$ is 10, then the lowest possible population of the town in $2021$ was

After two successive increments, Gopal's salary became $187.5 \%$ of his initial salary. If the percenta of salary increase in the second increment was twice of that in the first increment, then the percenta; of salary increase in the first increment was

In May, John bought the same amount of rice and the same amount of wheat as he had bought in April, but spent Rs. $150$ more due to price increase of rice and wheat by $20 \%$ and $12 \%$, respectively. If John had spent Rs. $450$ on rice in April, then how much did he spend on wheat in May?