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Cornerstone · Grades 3–5 Keystones #1 18 June 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 2⁄9

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 3x + 12 = 48

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 2:1

    Answer: 60 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 31, 5, 44, 50, 14, 16. Give your answer to 2 decimal places

    Answer: 26.67

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