O-LevelMathematicsNumber4024/13 · May/June 2025 · Q255 Marks
Simplify. √300 - √48
- (a)Simplify. √300 - √48[2]
- (b)Rationalise the denominator. Give your answer in its simplest form. 6 / (√7 + 2)[3]
Mark scheme
Marking points from the official mark scheme (May/June 2025). The mark or mark type is shown in brackets.
- [2] (a) 6√3 cao
- B1 for 10√3 or 4√3 seen or for answer √12
- [3] (b) 2(√7-2) final answer or 2√7 - 4 final answer
- M1 for × (√7 - 2) / (√7 - 2)
- B1 for 7 + 2√7 – 2√7 – 4 or better
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