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'Flapjack' printed from https://nrich.maths.org/
Answer: 32
8 flapjacks: We have:
2 oz butter 14 oz butter ($\times$7)
3 oz sugar 15 oz sugar ($\times$5)
4 oz rolled oats 16 oz rolled oats ($\times$4)
8$\times$4 = 32 (and there will be some butter and sugar left over).