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Cornerstone · Grades 3–5 Keystones #1 13 September 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 13 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 2⁄5

    Answer: 41⁄40
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 99

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Divide 98 in the ratio 4:2:1

    Answer: 56, 28 and 14
  5. 5. Statistics Mean

    Find the mean of: 14, 17, 14

    Answer: 15

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