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Cornerstone · Grades 3–5 Keystones #1 7 April 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 7 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 4⁄5

    Answer: 17⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 9 = 93

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 110 in the ratio 1:2:2

    Answer: 22, 44 and 44
  5. 5. Statistics Mean

    Find the mean of: 14, 11, 16

    Answer: 13.666666666667

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