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Cornerstone · Grades 3–5 Keystones #1 12 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 5x - 11 = 44

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 2:1

    Answer: 16 and 8
  5. 5. Statistics Mean

    Calculate the mean of: 28, 12, 17, 17, 42, 15, 21, 15. Give your answer to 2 decimal places

    Answer: 20.88

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