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Cornerstone · Grades 3–5 Keystones #1 18 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 18 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 5⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 35

    Answer: x = 4
  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 120 in the ratio 1:2

    Answer: 40 and 80
  5. 5. Statistics Mean

    Find the mean of: 4, 2, 11, 14, 19

    Answer: 10

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