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Cornerstone · Grades 3–5 Keystones #1 8 January 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 January 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 2⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x - 5 = 47

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 12cm

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 2:3:1

    Answer: 48, 72 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 45, 33, 47, 17, 17, 46

    Answer: 34.2

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