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Cornerstone · Grades 3–5 Keystones #1 23 April 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 April 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x - 14 = 10

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 1:3

    Answer: 10 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 38, 12, 25, 21, 17, 8, 18. Give your answer to 2 decimal places

    Answer: 19.86

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