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Cornerstone · Grades 3–5 Keystones #1 21 October 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 21 October 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄12 + 3⁄12

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

    Solve: 7x - 19 = 51

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 200 in the ratio 4:3:1

    Answer: 100, 75 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 36, 11, 26, 19, 49, 13. Give your answer to 2 decimal places

    Answer: 25.67

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