A company’s sales data for 3 products (A, B, C) over 2 quarters is:
| Quarter | A | B | C |
|---|---|---|---|
| Q1 | 100 | 150 | 200 |
| Q2 | 120 | 180 | 160 |
What is the percentage increase in sales of product A from Q1 to Q2?

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: