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

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

  1. 1. Number Adding fractions

    Add: 2⁄5 + 1⁄3

    Answer: 11⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x + 11 = 31

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 18.6cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 3:1

    Answer: 30 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 42, 34, 7, 28, 18, 48

    Answer: 29.5

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