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Cornerstone · Grades 3–5 Keystones #1 6 September 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄4

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 57

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 1:4

    Answer: 18 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 37, 6, 9, 45, 14, 17, 10. Give your answer to 2 decimal places

    Answer: 19.71