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Cornerstone · Grades 3–5 Keystones #1 21 October 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 6⁄7

    Answer: 19⁄14
  2. 2. Algebra Two-step equations

    Solve: 6x - 16 = 32

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 2:1

    Answer: 14 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 42, 39, 36, 31, 49, 28

    Answer: 37.5

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