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Cornerstone · Grades 3–5 Keystones #1 28 December 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 28 December 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 5⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 21

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 18 in the ratio 2:1

    Answer: 12 and 6
  5. 5. Statistics Mean

    Calculate the mean of: 22, 19, 7, 23, 9, 38. Give your answer to 2 decimal places

    Answer: 19.67

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