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Cornerstone · Grades 3–5 Keystones #1 22 February 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 22 February 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 1⁄3

    Answer: 23⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 28

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:4:3

    Answer: 21, 84 and 63
  5. 5. Statistics Mean

    Calculate the mean of: 25, 41, 18, 43, 48, 38

    Answer: 35.5

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