Quantitative Reasoning - JSS2 Mathematics Lesson Note

Quantitative reasoning involves using mathematical concepts to solve real-world problems. It often includes understanding numerical data, patterns, and relationships to make logical conclusions.

Example:

Suppose you are comparing the cost-effectiveness of two mobile plans.

Plan A charges a fixed fee of $30 per month plus $0.10 per minute of calls.

Plan B charges a fixed fee of $20 per month plus $0.20 per minute of calls.

To find out after how many minutes both plans cost the same, set up the equation:

30+0.10𝑥=20+0.20𝑥

Solve for 𝑥 (minutes): 30+0.10𝑥=20+0.20𝑥

30−20=0.20𝑥−0.10𝑥

10=0.10𝑥

𝑥=100

So, after 100 minutes, both plans will cost the same. This is a quantitative reasoning problem because it involves understanding and manipulating numerical data to draw a conclusion.