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Cornerstone · Grades 3–5 Keystones #1 24 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 13 = 67

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 1:1:2

    Answer: 28, 28 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 30, 7, 27, 13, 18, 40, 16, 48

    Answer: 24.9

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