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Cornerstone · Grades 3–5 Keystones #1 13 September 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 3⁄5

    Answer: 27⁄20
  2. 2. Algebra Two-step equations

    Solve: 8x - 16 = 40

    Answer: x = 7
  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 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 20, 26, 24, 24, 13, 20. Give your answer to 2 decimal places

    Answer: 21.17