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Cornerstone · Grades 3–5 Keystones #1 18 April 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 April 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄4

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

    Solve: 6x + 12 = 66

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 8cm

    Answer: 12.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 2:1:1

    Answer: 40, 20 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 20, 28, 12, 19, 21, 10, 32

    Answer: 20.3

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