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Cornerstone · Grades 3–5 Keystones #1 19 March 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 March 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 2⁄3

    Answer: 37⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x + 10 = 30

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 52 in the ratio 3:1

    Answer: 39 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 21, 34, 32, 25, 23, 11. Give your answer to 2 decimal places

    Answer: 24.33

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