May/June 2026 Paper 42

2026 · 22 questions · 39 parts · 100 marks

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Q1
1
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Q2
2(a)2(b)2(c)
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3
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6
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7(a)7(b)
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Q8
8(a)8(b)8(c)
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9
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10(a)10(b)
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16(a)16(b)16(c)16(d)
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17(a)17(b)17(c)17(d)
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Q18
18(a)18(b)18(c)
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19(a)19(b)
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20(a)20(b)20(c)
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Q22
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12Exponentials LogarithmsMedium3 marks
A scientist records the mass of a radioactive substance at the same time each day. On 10 January, the scientist records a mass of 150 grams. Each day, the mass of the substance decreases by 5%.
Find the date on which the scientist first records a mass of less than 96 grams.

Answer