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

  1. 1. Number Adding fractions

    Calculate: 6⁄12 + 1⁄12

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

    Solve: 6x + 8 = 26

    Answer: x = 3
  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 225 in the ratio 4:1:4

    Answer: 100, 25 and 100
  5. 5. Statistics Mean

    Find the mean of: 20, 15, 19, 20, 13

    Answer: 17.4

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