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Cornerstone · Grades 3–5 Keystones #1 29 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 2⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 41

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 11cm

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Share 126 in the ratio 3:4

    Answer: 54 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 33, 20, 15, 7, 17, 42

    Answer: 22.3

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