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Cornerstone · Grades 3–5 Keystones #1 30 November 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 30 November 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 2⁄3

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

    Solve: 7x + 15 = 57

    Answer: x = 6
  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 156 in the ratio 1:1:4

    Answer: 26, 26 and 104
  5. 5. Statistics Mean

    Find the mean of: 15, 17, 15, 11, 17

    Answer: 15

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