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Cornerstone · Grades 3–5 Keystones #1 18 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 5⁄6

    Answer: 35⁄24
  2. 2. Algebra Two-step equations

    Solve: 7x - 14 = 84

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 175 in the ratio 4:2:1

    Answer: 100, 50 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 15, 15, 6, 26, 35, 13, 13

    Answer: 17.6

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