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

  1. 1. Number Adding fractions

    Add: 6⁄7 + 1⁄5

    Answer: 37⁄35
  2. 2. Algebra Two-step equations

    Solve: 6x - 13 = 17

    Answer: x = 5
  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 120 in the ratio 1:2:2

    Answer: 24, 48 and 48
  5. 5. Statistics Mean

    Find the mean of: 3, 5, 9, 7

    Answer: 6

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