Pasta is sold in three packs: 750 g for £1.80, 500 g for £1.15 and 1.2 kg for £2.64. Which pack is the cheapest per 100 g?

Answer and explanation

Correct answer: C. The 1.2 kg pack for £2.64

  1. Step 1: 750 g: £1.80 ÷ 7.5 = 24p per 100 g. Step 2. 500 g: £1.15 ÷ 5 = 23p per 100 g. Step 3. 1.2 kg = 1,200 g: £2.64 ÷ 12 = 22p per 100 g, the lowest. Answer: The 1.2 kg pack for £2.64. Why not the others: The 750 g pack for £1.80: This costs 24p per 100 g, more than the 22p of the large pack. The 500 g pack for £1.15: This costs 23p per 100 g, more than the 22p of the large pack. They all cost the same per 100 g: This is false because the prices per 100 g are 24p, 23p and 22p.

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