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Cornerstone · Grades 3–5 Keystones #1 25 December 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 December 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 78

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

    Calculate the hypotenuse when a = 6cm and b = 13cm

    Answer: 14.32cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 3:1

    Answer: 60 and 20
  5. 5. Statistics Mean

    Find the mean of: 11, 17, 15, 4

    Answer: 11.75

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