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Cornerstone · Grades 3–5 Keystones #1 10 February 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 10 February 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄4

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

    Solve: 7x + 7 = 42

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Share 33 in the ratio 2:1

    Answer: 22 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 8, 42, 38, 16, 7, 33, 23

    Answer: 23.9

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