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Cornerstone · Grades 3–5 Keystones #1 17 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 7⁄8

    Answer: 13⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 18

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 1:2:2

    Answer: 28, 56 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 43, 34, 20, 38, 19, 32, 32, 27

    Answer: 30.6

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