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Cornerstone · Grades 3–5 Keystones #1 4 January 2023 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 1⁄9

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

    Solve: 3x - 18 = 18

    Answer: x = 12
  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 112 in the ratio 4:1:3

    Answer: 56, 14 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 16, 44, 37, 10, 9, 22, 19

    Answer: 22.4

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