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Cornerstone · Grades 3–5 Keystones #1 4 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 1⁄3

    Answer: 11⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 23

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 7.07cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 4:1

    Answer: 24 and 6
  5. 5. Statistics Mean

    Find the mean of: 18, 6, 4, 12, 15

    Answer: 11

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