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Cornerstone · Grades 3–5 Keystones #1 9 March 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 9 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄11 + 2⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 78

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 78 in the ratio 2:1

    Answer: 52 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 39, 25, 37, 26, 20, 41, 5

    Answer: 27.6

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