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Cornerstone · Grades 3–5 Keystones #1 9 January 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 19

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 8cm

    Answer: 8.94cm
  4. 4. Ratio Sharing in a ratio

    Share 20 in the ratio 3:1

    Answer: 15 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 47, 39, 5, 9, 38, 42, 14, 20

    Answer: 26.8

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