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Cornerstone · Grades 3–5 Keystones #1 28 December 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 28 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 5⁄6

    Answer: 31⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 29

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 3:2:2

    Answer: 57, 38 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 25, 49, 19, 25, 35, 28

    Answer: 30.2

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