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Cornerstone · Grades 3–5 Keystones #1 11 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 16 = 33

    Answer: x = 7
  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 175 in the ratio 4:1:2

    Answer: 100, 25 and 50
  5. 5. Statistics Mean

    Find the mean of: 13, 13, 9, 12

    Answer: 11.75

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