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Cornerstone · Grades 3–5 Keystones #1 12 January 2023 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 2⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = -7

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 9cm

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 96 in the ratio 1:4:1

    Answer: 16, 64 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 14, 8, 24, 46, 26, 26, 18

    Answer: 23.1

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