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Cornerstone · Grades 3–5 Keystones #1 26 January 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 January 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 1⁄9

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

    Solve: 7x - 7 = 70

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 207 in the ratio 3:2:4

    Answer: 69, 46 and 92
  5. 5. Statistics Mean

    Calculate the mean of: 32, 9, 45, 25, 30, 32, 21

    Answer: 27.7

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