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Cornerstone · Grades 3–5 Keystones #1 12 November 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 November 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 7⁄8

    Answer: 65⁄56
  2. 2. Algebra Two-step equations

    Solve: 6x - 10 = 20

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 152 in the ratio 3:1:4

    Answer: 57, 19 and 76
  5. 5. Statistics Mean

    Find the mean of: 14, 14, 16, 16

    Answer: 15

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