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Cornerstone · Grades 3–5 Keystones #1 25 June 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 25 June 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄7

    Answer: 25⁄28
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 71

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 2:1

    Answer: 24 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 39, 35, 12, 5, 39, 49, 27

    Answer: 29.4

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