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Cornerstone · Grades 3–5 Keystones #1 28 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 5⁄6

    Answer: 43⁄30
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = 0

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 11.7cm
  4. 4. Ratio Sharing in a ratio

    Share 108 in the ratio 1:2

    Answer: 36 and 72
  5. 5. Statistics Mean

    Find the mean of: 3, 13, 11

    Answer: 9

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