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Cornerstone · Grades 3–5 Keystones #1 20 October 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 20 October 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 1⁄6

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 30

    Answer: x = 3
  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

    Divide 280 in the ratio 3:3:4

    Answer: 84, 84 and 112
  5. 5. Statistics Mean

    Calculate the mean of: 50, 33, 49, 26, 42, 27

    Answer: 37.8

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