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

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x - 5 = 93

    Answer: x = 14
  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 161 in the ratio 2:4:1

    Answer: 46, 92 and 23
  5. 5. Statistics Mean

    Calculate the mean of: 44, 18, 24, 40, 11, 35

    Answer: 28.7

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