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Cornerstone · Grades 3–5 Keystones #1 11 September 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄4

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

    Solve: 2x - 10 = 16

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Divide 128 in the ratio 3:3:2

    Answer: 48, 48 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 37, 10, 20, 12, 16, 16, 29

    Answer: 20

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