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Cornerstone · Grades 3–5 Keystones #1 18 January 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄8

    Answer: 13⁄40
  2. 2. Algebra Two-step equations

    Solve: 7x + 12 = 47

    Answer: x = 5
  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 224 in the ratio 1:1:2

    Answer: 56, 56 and 112
  5. 5. Statistics Mean

    Find the mean of: 14, 5, 16

    Answer: 11.666666666667

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