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Cornerstone · Grades 3–5 Keystones #1 10 October 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 October 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = -2

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 7.62cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 25, 50, 50, 26, 20, 11, 28

    Answer: 30

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