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Cornerstone · Grades 3–5 Keystones #1 12 August 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 August 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 29

    Answer: x = 7
  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

    Share 63 in the ratio 4:3

    Answer: 36 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 30, 34, 29, 22, 29, 33, 37. Give your answer to 2 decimal places

    Answer: 30.57

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