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Cornerstone · Grades 3–5 Keystones #1 22 February 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 22 February 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄6

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 7x + 13 = 34

    Answer: x = 3
  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 120 in the ratio 4:1:1

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

    Find the mean of: 13, 14, 11, 10, 15

    Answer: 12.6

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