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Cornerstone · Grades 3–5 Keystones #1 3 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 1⁄5

    Answer: 32⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x - 9 = 96

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 16.97cm
  4. 4. Ratio Sharing in a ratio

    Divide 156 in the ratio 1:4:1

    Answer: 26, 104 and 26
  5. 5. Statistics Mean

    Find the mean of: 17, 6, 8, 9

    Answer: 10

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