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Cornerstone · Grades 3–5 Keystones #1 7 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 3⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 6x - 10 = 44

    Answer: x = 9
  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 126 in the ratio 2:1:3

    Answer: 42, 21 and 63
  5. 5. Statistics Mean

    Calculate the mean of: 26, 10, 40, 38, 47, 37, 6, 20

    Answer: 28

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