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Cornerstone · Grades 3–5 Keystones #1 4 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 1⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 11 = 38

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 2:3

    Answer: 14 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 46, 31, 43, 18, 33, 37. Give your answer to 2 decimal places

    Answer: 34.67

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