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Cornerstone · Grades 3–5 Keystones #1 21 November 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 November 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 5⁄7

    Answer: 53⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 45

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 133 in the ratio 4:3

    Answer: 76 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 44, 31, 38, 7, 12, 24, 37. Give your answer to 2 decimal places

    Answer: 27.57

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