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Cornerstone · Grades 3–5 Keystones #1 21 December 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 21 December 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 1⁄5

    Answer: 27⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 57

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 3:4:2

    Answer: 72, 96 and 48
  5. 5. Statistics Mean

    Find the mean of: 7, 6, 8, 3, 12

    Answer: 7.2

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