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Cornerstone · Grades 3–5 Keystones #1 31 July 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄5

    Answer: 8⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 50

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 7cm. Give your answer to 2 decimal places

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

    Share 105 in the ratio 4:3

    Answer: 60 and 45
  5. 5. Statistics Mean

    Find the mean of: 12, 8, 14, 10, 16

    Answer: 12

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