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Cornerstone · Grades 3–5 Keystones #1 6 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 2⁄3

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 23

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:2:4

    Answer: 12, 24 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 36, 40, 19, 44, 43, 43, 32

    Answer: 36.7

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