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Cornerstone · Grades 3–5 Keystones #1 8 October 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 8 October 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 2⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x + 12 = 21

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 2:4:3

    Answer: 48, 96 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 29, 26, 27, 27, 22, 8. Give your answer to 2 decimal places

    Answer: 23.17

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