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Cornerstone · Grades 3–5 Keystones #1 26 December 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 26 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 4⁄5

    Answer: 22⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 63

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 100 in the ratio 3:4:3

    Answer: 30, 40 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 31, 26, 45, 16, 8, 26, 24. Give your answer to 2 decimal places

    Answer: 25.14

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