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

Five GCSE retrieval questions · 7 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 5⁄7

    Answer: 53⁄35
  2. 2. Algebra Two-step equations

    Solve: 5x - 9 = 66

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

    Calculate the hypotenuse when a = 9cm and b = 10cm

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Share 119 in the ratio 4:3

    Answer: 68 and 51
  5. 5. Statistics Mean

    Find the mean of: 17, 18, 2, 4, 11

    Answer: 10.4

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