Library / South African Mathematics Olympiad /30 of 48

South African Mathematics Olympiad

Algebra Difficulty 4.1 AIME Find the answer South Africa

I have R4. How many sweets can I buy if one sweet costs 40c?

Your answer

A number or a short expression. Fractions can be typed as 3/2, and spacing doesn't matter.

Solution

Since total cost = number of sweets × cost of each sweet, it follows that the number of sweets is $\text{R}4.00 \div 40\text{c} = \text{R}4.00 \div \text{R}0.40 = 4 \div 0.4 = 10$ .

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: MathNet, licensed CC-BY-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.