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Cornerstone · Grades 3–5 Keystones #1 22 February 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 22 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄5

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 6x - 14 = 10

    Answer: x = 4
  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 200 in the ratio 1:3:4

    Answer: 25, 75 and 100
  5. 5. Statistics Mean

    Find the mean of: 12, 12, 12, 18, 2

    Answer: 11.2

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