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Cornerstone · Grades 3–5 Keystones #1 10 January 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 7⁄8

    Answer: 73⁄56
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 71

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 3:4

    Answer: 30 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 37, 44, 41, 11, 36, 10

    Answer: 29.8

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