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Cornerstone · Grades 3–5 Keystones #1 9 April 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 9 April 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄8 + 3⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 2x + 6 = 20

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 1:4:1

    Answer: 24, 96 and 24
  5. 5. Statistics Mean

    Find the mean of: 13, 21, 12, 6

    Answer: 13

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