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Cornerstone · Grades 3–5 Keystones #1 28 January 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 28 January 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 1⁄4

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 3x - 7 = 5

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 96 in the ratio 3:4:1

    Answer: 36, 48 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 9, 23, 29, 10, 47, 21, 5. Give your answer to 2 decimal places

    Answer: 20.57

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