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Cornerstone · Grades 3–5 Keystones #1 14 September 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 3⁄4

    Answer: 45⁄28
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 78

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

    Calculate the hypotenuse when a = 4cm and b = 4cm

    Answer: 5.66cm
  4. 4. Ratio Sharing in a ratio

    Divide 232 in the ratio 2:3:3

    Answer: 58, 87 and 87
  5. 5. Statistics Mean

    Calculate the mean of: 23, 25, 15, 50, 37, 13, 42, 46

    Answer: 31.4

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