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

  1. 1. Number Adding fractions

    Add: 3⁄4 + 5⁄6

    Answer: 19⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 19 = 9

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 3:2

    Answer: 21 and 14
  5. 5. Statistics Mean

    Find the mean of: 20, 6, 17

    Answer: 14.333333333333

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