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Cornerstone · Grades 3–5 Keystones #1 31 October 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 1⁄4

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 8x - 18 = 46

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 8.06cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:4:2

    Answer: 12, 48 and 24
  5. 5. Statistics Mean

    Find the mean of: 17, 20, 3, 20

    Answer: 15

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