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Cornerstone · Grades 3–5 Keystones #1 10 October 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 10 October 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 5 = 17

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 140 in the ratio 3:4

    Answer: 60 and 80
  5. 5. Statistics Mean

    Find the mean of: 3, 20, 2

    Answer: 8.3333333333333

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