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Cornerstone · Grades 3–5 Keystones #1 8 November 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 8 November 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x - 10 = 6

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 3:3:1

    Answer: 90, 90 and 30
  5. 5. Statistics Mean

    Find the mean of: 18, 14, 10, 6

    Answer: 12

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