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Cornerstone · Grades 3–5 Keystones #1 25 January 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 25 January 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 3⁄4

    Answer: 41⁄28
  2. 2. Algebra Two-step equations

    Solve: 5x + 14 = 39

    Answer: x = 5
  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 168 in the ratio 1:3:3

    Answer: 24, 72 and 72
  5. 5. Statistics Mean

    Find the mean of: 8, 6, 18

    Answer: 10.666666666667

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