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Cornerstone · Grades 3–5 Keystones #1 6 October 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 October 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 1⁄3

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 114

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

    Calculate the hypotenuse when a = 12cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 17.69cm
  4. 4. Ratio Sharing in a ratio

    Divide 78 in the ratio 4:1:1

    Answer: 52, 13 and 13
  5. 5. Statistics Mean

    Find the mean of: 9, 12, 13, 14

    Answer: 12

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