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

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

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

    Solve: 8x - 14 = 74

    Answer: x = 11
  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

    Share 49 in the ratio 4:3

    Answer: 28 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 32, 12, 15, 43, 9, 50, 17

    Answer: 25.4

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