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Cornerstone · Grades 3–5 Keystones #1 25 July 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 25 July 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 25

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 91 in the ratio 2:3:2

    Answer: 26, 39 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 32, 31, 39, 48, 24, 18, 17

    Answer: 29.9

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