Level 1: Core Concepts Check (Aiming for a Pass - 'S')

1. Define: What is an inverse proportion? Give one real-world example.

2. Identify: A task requires 60 man-days to complete. How many days will it take for 10 men?

3. Calculate: A journey takes 4 hours at a speed of 60 km/h. How long will it take at 80 km/h?

Level 2: Connecting the Dots (Aiming for a Credit - 'C'/'B')

1. Explain: A hostel has enough food for 100 students for 15 days. Explain, step-by-step, how to find out how long the food would last if 20 more students join.

2. Apply: A farmer estimates it will take 10 men 8 days to clear his land. He hires 12 men for the first 2 days. How many more men should he hire to complete the rest of the work in the next 4 days?

Level 3: Exam Challenge (Aiming for a Distinction - 'A')

Scenario Analysis: A contractor undertakes to build a wall in 30 days with 15 workers. They work for 6 days. After this, he realizes that only 51​ of the wall is built.

(a) How many man-days of work were planned for the entire wall?

(b) How many man-days were completed in the first 6 days?

(c) How many additional workers must he hire to complete the wall exactly on time?