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Cornerstone · Grades 3–5 Keystones #1 23 June 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 June 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄4

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 71

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 3:1

    Answer: 18 and 6
  5. 5. Statistics Mean

    Calculate the mean of: 19, 14, 43, 11, 16, 32, 47, 36

    Answer: 27.25

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