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Cornerstone · Grades 3–5 Keystones #1 26 August 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 4⁄8

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 50

    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 270 in the ratio 3:4:3

    Answer: 81, 108 and 81
  5. 5. Statistics Mean

    Calculate the mean of: 39, 31, 47, 15, 6, 36, 42, 28

    Answer: 30.5

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