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Cornerstone · Grades 3–5 Keystones #1 30 June 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 June 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 4⁄5

    Answer: 33⁄35
  2. 2. Algebra Two-step equations

    Solve: 5x - 15 = 25

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 198 in the ratio 4:1:4

    Answer: 88, 22 and 88
  5. 5. Statistics Mean

    Calculate the mean of: 50, 38, 28, 14, 24, 38

    Answer: 32

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