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Cornerstone · Grades 3–5 Keystones #50 19 February 2026 Skills week 1 of 7
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Five GCSE retrieval questions · 19 February 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 4⁄6

    Answer: 4⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 57

    Answer: x = 10
  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

    Share 95 in the ratio 2:3

    Answer: 38 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 33, 12, 6, 16, 26, 6, 44, 21

    Answer: 20.5

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