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Cornerstone · Grades 3–5 Keystones #1 7 March 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 March 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x + 5 = 89

    Answer: x = 12
  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 45 in the ratio 1:4

    Answer: 9 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 48, 38, 21, 30, 19, 22, 6. Give your answer to 2 decimal places

    Answer: 26.29

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