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Cornerstone · Grades 3–5 Keystones #1 22 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 1⁄5

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x - 7 = 28

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 5.83cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 1:4:2

    Answer: 10, 40 and 20
  5. 5. Statistics Mean

    Find the mean of: 2, 17, 10, 5, 6

    Answer: 8

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