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Cornerstone · Grades 3–5 Keystones #1 20 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄7

    Answer: 41⁄42
  2. 2. Algebra Two-step equations

    Solve: 6x - 9 = 75

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 175 in the ratio 3:3:1

    Answer: 75, 75 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 49, 38, 43, 12, 46, 20. Give your answer to 2 decimal places

    Answer: 34.67

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