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Cornerstone · Grades 3–5 Keystones #1 26 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 26 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 4⁄5

    Answer: 17⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 6 = 69

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 3:1:2

    Answer: 54, 18 and 36
  5. 5. Statistics Mean

    Find the mean of: 5, 14, 7, 11

    Answer: 9.25

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