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Cornerstone · Grades 3–5 Keystones #1 29 September 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 29 September 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 2⁄8

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = 15

    Answer: x = 10
  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 243 in the ratio 4:4:1

    Answer: 108, 108 and 27
  5. 5. Statistics Mean

    Find the mean of: 7, 10, 18

    Answer: 11.666666666667

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