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Cornerstone · Grades 3–5 Keystones #1 21 September 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 2⁄4

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x + 10 = 43

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Divide 153 in the ratio 3:4:2

    Answer: 51, 68 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 25, 13, 9, 49, 5, 21. Give your answer to 2 decimal places

    Answer: 20.33

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