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Cornerstone · Grades 3–5 Keystones #1 6 February 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄5

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 13

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 100 in the ratio 2:1:2

    Answer: 40, 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 7, 35, 18, 24, 22, 7, 43

    Answer: 22.3

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