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Cornerstone · Grades 3–5 Keystones #1 17 February 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 17 February 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 81

    Answer: x = 10
  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 220 in the ratio 2:1:2

    Answer: 88, 44 and 88
  5. 5. Statistics Mean

    Calculate the mean of: 40, 33, 32, 14, 12, 43

    Answer: 29

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