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Cornerstone · Grades 3–5 Keystones #1 6 October 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 October 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄3

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 81

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 9cm

    Answer: 10.82cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 4:1

    Answer: 72 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 37, 5, 49, 20, 15, 42, 35, 49

    Answer: 31.5

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