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Cornerstone · Grades 3–5 Keystones #1 11 October 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 11 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 2⁄9

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 72

    Answer: x = 10
  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 99 in the ratio 4:1:4

    Answer: 44, 11 and 44
  5. 5. Statistics Mean

    Find the mean of: 9, 9, 18

    Answer: 12

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