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Cornerstone · Grades 3–5 Keystones #1 17 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 3⁄4

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

    Solve: 2x - 8 = 22

    Answer: x = 15
  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

    Divide 120 in the ratio 3:2:3

    Answer: 45, 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 34, 38, 18, 40, 5, 39, 45

    Answer: 31.3

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