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Cornerstone · Grades 3–5 Keystones #1 17 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 9 = 27

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

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

    Answer: 7.07cm
  4. 4. Ratio Sharing in a ratio

    Share 56 in the ratio 4:3

    Answer: 32 and 24
  5. 5. Statistics Mean

    Find the mean of: 9, 11, 11, 5

    Answer: 9

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