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Cornerstone · Grades 3–5 Keystones #1 30 September 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 30 September 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 8x - 8 = 80

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 10cm

    Answer: 15.62cm
  4. 4. Ratio Sharing in a ratio

    Divide 240 in the ratio 3:4:1

    Answer: 90, 120 and 30
  5. 5. Statistics Mean

    Find the mean of: 3, 18, 3, 2, 16

    Answer: 8.4

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