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UKMT Intermediate Mathematical Challenge, 2022

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

My recipe for apple crumble uses 100 g of flour, 50 g of butter and 50 g of sugar to make the crumble topping. When my family come for a meal, I have to use two and a half times each amount to provide enough crumble. In total, how much crumble topping do I then make?

(A) $0.5\text{ kg}$ (B) $2\text{ kg}$ (C) $2.5\text{ kg}$ (D) $5\text{ kg}$ (E) $50\text{ kg}$

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