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Cornerstone · Grades 3–5 Keystones #1 9 May 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 9 May 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄8 + 1⁄8

    Answer: 5⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x - 18 = 24

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 1:1:3

    Answer: 21, 21 and 63
  5. 5. Statistics Mean

    Find the mean of: 16, 19, 14, 11, 10

    Answer: 14

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