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Cornerstone · Grades 3–5 Keystones #1 21 July 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 1⁄10

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

    Solve: 3x + 4 = 40

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

    Calculate the hypotenuse when a = 8cm and b = 5cm

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Share 49 in the ratio 4:3

    Answer: 28 and 21
  5. 5. Statistics Mean

    Find the mean of: 6, 6, 14, 12, 18

    Answer: 11.2

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