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Cornerstone · Grades 3–5 Keystones #1 2 February 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 5⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 14 = 50

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 1:2

    Answer: 24 and 48
  5. 5. Statistics Mean

    Find the mean of: 3, 20, 17, 9, 8

    Answer: 11.4

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