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Cornerstone · Grades 3–5 Keystones #1 2 March 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 31

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 4:1

    Answer: 60 and 15
  5. 5. Statistics Mean

    Find the mean of: 8, 14, 7, 19

    Answer: 12

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