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Cornerstone · Grades 3–5 Keystones #1 10 December 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 1⁄3

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 12 = 44

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 100 in the ratio 4:3:3

    Answer: 40, 30 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 17, 32, 15, 23, 14, 23, 33

    Answer: 22.4

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