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Cornerstone · Grades 3–5 Keystones #1 21 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄11 + 3⁄11

    Answer: 5⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x - 19 = -3

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Divide 260 in the ratio 2:2:1

    Answer: 104, 104 and 52
  5. 5. Statistics Mean

    Find the mean of: 7, 9, 15

    Answer: 10.333333333333

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