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Cornerstone · Grades 3–5 Keystones #1 25 July 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 25 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄3

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 35

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 3:1:3

    Answer: 45, 15 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 49, 31, 45, 32, 47, 25

    Answer: 38.2

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