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Cornerstone · Grades 3–5 Keystones #1 8 May 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 May 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄3

    Answer: 23⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 18

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

    Calculate the hypotenuse when a = 12cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 19.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 280 in the ratio 1:2:2

    Answer: 56, 112 and 112
  5. 5. Statistics Mean

    Find the mean of: 2, 15, 8, 3

    Answer: 7

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