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Cornerstone · Grades 3–5 Keystones #1 10 September 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 10 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 1⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 5x - 16 = 4

    Answer: x = 4
  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

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Find the mean of: 9, 8, 8

    Answer: 8.3333333333333

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