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Cornerstone · Grades 3–5 Keystones #1 21 November 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 21 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 3⁄12

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

    Solve: 2x + 10 = 18

    Answer: x = 4
  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 168 in the ratio 2:1:4

    Answer: 48, 24 and 96
  5. 5. Statistics Mean

    Calculate the mean of: 17, 48, 21, 15, 47, 42, 32

    Answer: 31.7

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