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Cornerstone · Grades 3–5 Keystones #1 24 October 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 24 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄5

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

    Solve: 7x + 15 = 43

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 56 in the ratio 3:4

    Answer: 24 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 22, 24, 20, 36, 46, 13, 22, 7

    Answer: 23.75

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