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Cornerstone · Grades 3–5 Keystones #1 15 April 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 April 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 28 + 27

    Answer: 1528
  2. 2. Algebra Two-step equations

    Solve: 3x - 19 = 26

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 6cm

    Answer: 10.82cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 2:4:1

    Answer: 38, 76 and 19
  5. 5. Statistics Mean

    Find the mean of: 13, 10, 3, 3, 13

    Answer: 8.4