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Cornerstone · Grades 3–5 Keystones #1 19 April 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 April 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄6

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 3x + 12 = 33

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 17.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 3:3:1

    Answer: 30, 30 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 20, 25, 37, 13, 48, 49, 37. Give your answer to 2 decimal places

    Answer: 32.71