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Cornerstone · Grades 3–5 Keystones #1 16 March 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 March 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 6⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 51

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 9.22cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 1:4:4

    Answer: 14, 56 and 56
  5. 5. Statistics Mean

    Find the mean of: 22, 7, 9, 2, 10

    Answer: 10

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