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Cornerstone · Grades 3–5 Keystones #1 30 January 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 43

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

    Calculate the hypotenuse when a = 7cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 8.06cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 3:2

    Answer: 27 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 48, 26, 21, 50, 20, 21, 28, 13. Give your answer to 2 decimal places

    Answer: 28.38

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