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Cornerstone · Grades 3–5 Keystones #1 14 April 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 14 April 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 30

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 4:1:1

    Answer: 80, 20 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 9, 45, 46, 19, 48, 26, 22

    Answer: 30.7

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