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Cornerstone · Grades 3–5 Keystones #1 13 November 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 13 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 1⁄6

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

    Solve: 2x + 15 = 21

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 20 in the ratio 3:1

    Answer: 15 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 15, 29, 38, 29, 25, 41, 28

    Answer: 29.3

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