
We check for 1983 to 1986 if any bank had \( \geq 20% \) each year:
Bank A: \[ \text{1983: } \frac{23}{120} = 19.17%,\quad \text{Not qualified} \] Bank B: \[ \text{1984: } \frac{18}{140} = 12.85%,\quad \text{Not qualified} \] Bank C: \[ \text{1986: } \frac{11}{203} = 5.42%,\quad \text{Not qualified} \] Hence, none of the banks meet the criterion.

In a sequence of numbers, each term is generated by multiplying the previous term by 2 and then subtracting 1. If the first term is 3, what is the fourth term in the sequence?
A pie chart shows the distribution of students across 5 faculties in a university. If 20% are in Arts, 25% in Science, 15% in Law, 30% in Engineering, and the rest in Commerce, what is the angle (in degrees) for Commerce?
For any natural number $k$, let $a_k = 3^k$. The smallest natural number $m$ for which \[ (a_1)^1 \times (a_2)^2 \times \dots \times (a_{20})^{20} \;<\; a_{21} \times a_{22} \times \dots \times a_{20+m} \] is: