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Cornerstone · Grades 3–5 Keystones #1 19 July 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 July 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 3⁄6

    Answer: 11⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x - 19 = 41

    Answer: x = 12
  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 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 31, 11, 21, 47, 32, 13. Give your answer to 2 decimal places

    Answer: 25.83