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Cornerstone · Grades 3–5 Keystones #1 8 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 8 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄5

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 3x - 14 = 22

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 12cm

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Divide 300 in the ratio 2:2:1

    Answer: 120, 120 and 60
  5. 5. Statistics Mean

    Find the mean of: 2, 6, 13, 16, 15

    Answer: 10.4

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