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Cornerstone · Grades 3–5 Keystones #1 10 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 1⁄10

    Answer: 1⁄5
  2. 2. Algebra Two-step equations

    Solve: 8x - 15 = 105

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 20 in the ratio 3:1

    Answer: 15 and 5
  5. 5. Statistics Mean

    Find the mean of: 6, 20, 20, 2

    Answer: 12

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