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Cornerstone · Grades 3–5 Keystones #1 22 January 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 January 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 5⁄9

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

    Solve: 6x + 5 = 29

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 119 in the ratio 3:4

    Answer: 51 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 42, 36, 10, 38, 45, 31. Give your answer to 2 decimal places

    Answer: 33.67

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